231241430440 has 32 divisors (see below), whose sum is σ = 522144821160. Its totient is φ = 92167398400.

The previous prime is 231241430437. The next prime is 231241430489. The reversal of 231241430440 is 44034142132.

It can be written as a sum of positive squares in 4 ways, for example, as 226859784804 + 4381645636 = 476298^2 + 66194^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231241430399 and 231241430408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10275301 + ... + 10297780.

Almost surely, 2^231241430440 is an apocalyptic number.

231241430440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231241430440 is an abundant number, since it is smaller than the sum of its proper divisors (290903390720).

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

231241430440 is a wasteful number, since it uses less digits than its factorization.

231241430440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20573373 (or 20573369 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 231241430440 its reverse (44034142132), we get a palindrome (275275572572).

The spelling of 231241430440 in words is "two hundred thirty-one billion, two hundred forty-one million, four hundred thirty thousand, four hundred forty".