31510552242 has 64 divisors (see below), whose sum is σ = 71512560000. Its totient is φ = 9176053248.

The previous prime is 31510552219. The next prime is 31510552259. The reversal of 31510552242 is 24225501513.

It is a super-2 number, since 2×31510552242² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1544484 + ... + 1564752.

It is an arithmetic number, because the mean of its divisors is an integer number (1117383750).

Almost surely, 2^31510552242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31510552242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35756280000).

31510552242 is an abundant number, since it is smaller than the sum of its proper divisors (40002007758).

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

31510552242 is a wasteful number, since it uses less digits than its factorization.

31510552242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21355.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 31510552242 in words is "thirty-one billion, five hundred ten million, five hundred fifty-two thousand, two hundred forty-two".