31256000000 has 140 divisors (see below), whose sum is σ = 78082672404. Its totient is φ = 12499200000.

The previous prime is 31255999981. The next prime is 31256000011. The reversal of 31256000000 is 65213.

It is a taxicab number since it can be written as a sum of two cubes in more than one way. Here 31256000000 = 50³ + 3150³ = 2480³ + 2520³.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 7998047 + ... + 8001953.

Almost surely, 2^31256000000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31256000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39041336202).

31256000000 is an abundant number, since it is smaller than the sum of its proper divisors (46826672404).

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

31256000000 is an frugal number, since it uses more digits than its factorization.

31256000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3955 (or 3914 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

Adding to 31256000000 its reverse (65213), we get a palindrome (31256065213).

The spelling of 31256000000 in words is "thirty-one billion, two hundred fifty-six million", and thus it is an aban number.