231240456 has 24 divisors (see below), whose sum is σ = 626276430. Its totient is φ = 77080128.

The previous prime is 231240419. The next prime is 231240467. The reversal of 231240456 is 654042132.

It can be written as a sum of positive squares in only one way, i.e., 152917956 + 78322500 = 12366^2 + 8850^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1605765 + ... + 1605908.

Almost surely, 2^231240456 is an apocalyptic number.

It is an amenable number.

231240456 is an abundant number, since it is smaller than the sum of its proper divisors (395035974).

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

231240456 is a wasteful number, since it uses less digits than its factorization.

231240456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3211685 (or 3211678 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 231240456 is about 15206.5925177207. The cubic root of 231240456 is about 613.7920688544.

Adding to 231240456 its reverse (654042132), we get a palindrome (885282588).

The spelling of 231240456 in words is "two hundred thirty-one million, two hundred forty thousand, four hundred fifty-six".