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230231020 = 22537311123
BaseRepresentation
bin11011011100100…
…00101111101100
3121001012221120211
431232100233230
5432414343040
634502352204
75463634315
oct1556205754
9531187524
10230231020
11108a60a78
126512b664
1338910496
142281160c
151532b8ea
hexdb90bec

230231020 has 24 divisors (see below), whose sum is σ = 496553904. Its totient is φ = 89603136.

The previous prime is 230231003. The next prime is 230231021. The reversal of 230231020 is 20132032.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (230231021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154822 + ... + 156301.

It is an arithmetic number, because the mean of its divisors is an integer number (20689746).

Almost surely, 2230231020 is an apocalyptic number.

230231020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

230231020 is an abundant number, since it is smaller than the sum of its proper divisors (266322884).

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

230231020 is a wasteful number, since it uses less digits than its factorization.

230231020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311169 (or 311167 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 230231020 is about 15173.3654803409. The cubic root of 230231020 is about 612.8976354543.

Adding to 230231020 its reverse (20132032), we get a palindrome (250363052).

The spelling of 230231020 in words is "two hundred thirty million, two hundred thirty-one thousand, twenty".

Divisors: 1 2 4 5 10 20 37 74 148 185 370 740 311123 622246 1244492 1555615 3111230 6222460 11511551 23023102 46046204 57557755 115115510 230231020