31257226000 has 480 divisors, whose sum is σ = 102120535296. Its totient is φ = 8985600000.

The previous prime is 31257225977. The next prime is 31257226139. The reversal of 31257226000 is 62275213.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 31257226000.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26025400 + ... + 26026600.

Almost surely, 2^31257226000 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 31257226000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51060267648).

31257226000 is an abundant number, since it is smaller than the sum of its proper divisors (70863309296).

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

31257226000 is a wasteful number, since it uses less digits than its factorization.

31257226000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268 (or 1239 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The spelling of 31257226000 in words is "thirty-one billion, two hundred fifty-seven million, two hundred twenty-six thousand".