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230111444 = 22401143461
BaseRepresentation
bin11011011011100…
…11100011010100
3121000222212120002
431231303203110
5432402031234
634500030432
75462625563
oct1555634324
9530885502
10230111444
1110898a152
1265092418
133889ac24
14227bdbda
151530627e
hexdb738d4

230111444 has 12 divisors (see below), whose sum is σ = 403702068. Its totient is φ = 114768000.

The previous prime is 230111383. The next prime is 230111449. The reversal of 230111444 is 444111032.

It can be written as a sum of positive squares in 2 ways, for example, as 214271044 + 15840400 = 14638^2 + 3980^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230111449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70127 + ... + 73334.

It is an arithmetic number, because the mean of its divisors is an integer number (33641839).

Almost surely, 2230111444 is an apocalyptic number.

It is an amenable number.

230111444 is a deficient number, since it is larger than the sum of its proper divisors (173590624).

230111444 is a wasteful number, since it uses less digits than its factorization.

230111444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143866 (or 143864 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 230111444 is about 15169.4246430113. The cubic root of 230111444 is about 612.7915093855.

Adding to 230111444 its reverse (444111032), we get a palindrome (674222476).

The spelling of 230111444 in words is "two hundred thirty million, one hundred eleven thousand, four hundred forty-four".

Divisors: 1 2 4 401 802 1604 143461 286922 573844 57527861 115055722 230111444