31255379240 has 256 divisors, whose sum is σ = 82093824000. Its totient is φ = 10630103040.

The previous prime is 31255379237. The next prime is 31255379263. The reversal of 31255379240 is 4297355213.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29237426 + ... + 29238494.

It is an arithmetic number, because the mean of its divisors is an integer number (320679000).

Almost surely, 2^31255379240 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 31255379240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41046912000).

31255379240 is an abundant number, since it is smaller than the sum of its proper divisors (50838444760).

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

31255379240 is a wasteful number, since it uses less digits than its factorization.

31255379240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220 (or 1216 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 41.

The spelling of 31255379240 in words is "thirty-one billion, two hundred fifty-five million, three hundred seventy-nine thousand, two hundred forty".