231240107956 has 24 divisors (see below), whose sum is σ = 475416726624. Its totient is φ = 97023821280.

The previous prime is 231240107911. The next prime is 231240107957. The reversal of 231240107956 is 659701042132.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231240107957) 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, 202132390 + ... + 202133533.

It is an arithmetic number, because the mean of its divisors is an integer number (19809030276).

Almost surely, 2^231240107956 is an apocalyptic number.

231240107956 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

231240107956 is an abundant number, since it is smaller than the sum of its proper divisors (244176618668).

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

231240107956 is a wasteful number, since it uses less digits than its factorization.

231240107956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404265951 (or 404265949 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 231240107956 in words is "two hundred thirty-one billion, two hundred forty million, one hundred seven thousand, nine hundred fifty-six".