31256285880288 has 144 divisors (see below), whose sum is σ = 95458031507664. Its totient is φ = 8928989153280.

The previous prime is 31256285880247. The next prime is 31256285880299. The reversal of 31256285880288 is 88208858265213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30165306 + ... + 31184262.

It is an arithmetic number, because the mean of its divisors is an integer number (662902996581).

Almost surely, 2^{31256285880288} 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 31256285880288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47729015753832).

31256285880288 is an abundant number, since it is smaller than the sum of its proper divisors (64201745627376).

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

31256285880288 is a wasteful number, since it uses less digits than its factorization.

31256285880288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025505 (or 1025490 counting only the distinct ones).

The product of its (nonzero) digits is 117964800, while the sum is 66.

The spelling of 31256285880288 in words is "thirty-one trillion, two hundred fifty-six billion, two hundred eighty-five million, eight hundred eighty thousand, two hundred eighty-eight".