31240400243232 has 96 divisors (see below), whose sum is σ = 83492582265792. Its totient is φ = 10225681449984.

The previous prime is 31240400243209. The next prime is 31240400243249. The reversal of 31240400243232 is 23234200404213.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 31240400243232.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5621983 + ... + 9699870.

It is an arithmetic number, because the mean of its divisors is an integer number (869714398602).

Almost surely, 2^{31240400243232} is an apocalyptic number.

31240400243232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31240400243232 is an abundant number, since it is smaller than the sum of its proper divisors (52252182022560).

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

31240400243232 is a wasteful number, since it uses less digits than its factorization.

31240400243232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15322250 (or 15322242 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 31240400243232 its reverse (23234200404213), we get a palindrome (54474600647445).

The spelling of 31240400243232 in words is "thirty-one trillion, two hundred forty billion, four hundred million, two hundred forty-three thousand, two hundred thirty-two".