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230243442 = 2311131491801
BaseRepresentation
bin11011011100100…
…11110001110010
3121001020120121220
431232103301302
5432420242232
634502525510
75464015452
oct1556236162
9531216556
10230243442
11108a6a340
1265136896
1338916030
1422815d62
151533042c
hexdb93c72

230243442 has 64 divisors (see below), whose sum is σ = 544924800. Its totient is φ = 63936000.

The previous prime is 230243437. The next prime is 230243443. The reversal of 230243442 is 244342032.

230243442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (230243443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126942 + ... + 128742.

It is an arithmetic number, because the mean of its divisors is an integer number (8514450).

Almost surely, 2230243442 is an apocalyptic number.

230243442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 230243442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272462400).

230243442 is an abundant number, since it is smaller than the sum of its proper divisors (314681358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

230243442 is a wasteful number, since it uses less digits than its factorization.

230243442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979.

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 230243442 is about 15173.7748105078. The cubic root of 230243442 is about 612.9086581183.

Adding to 230243442 its reverse (244342032), we get a palindrome (474585474).

The spelling of 230243442 in words is "two hundred thirty million, two hundred forty-three thousand, four hundred forty-two".

Divisors: 1 2 3 6 11 13 22 26 33 39 66 78 143 149 286 298 429 447 858 894 1639 1801 1937 3278 3602 3874 4917 5403 5811 9834 10806 11622 19811 21307 23413 39622 42614 46826 59433 63921 70239 118866 127842 140478 257543 268349 515086 536698 772629 805047 1545258 1610094 2951839 3488537 5903678 6977074 8855517 10465611 17711034 20931222 38373907 76747814 115121721 230243442