31395530992 has 80 divisors (see below), whose sum is σ = 73226741760. Its totient is φ = 12738491136.

The previous prime is 31395530989. The next prime is 31395531053. The reversal of 31395530992 is 29903559313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3875298 + ... + 3883390.

It is an arithmetic number, because the mean of its divisors is an integer number (915334272).

Almost surely, 2^31395530992 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 31395530992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36613370880).

31395530992 is an abundant number, since it is smaller than the sum of its proper divisors (41831210768).

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

31395530992 is a wasteful number, since it uses less digits than its factorization.

31395530992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9950 (or 9944 counting only the distinct ones).

The product of its (nonzero) digits is 984150, while the sum is 49.

The spelling of 31395530992 in words is "thirty-one billion, three hundred ninety-five million, five hundred thirty thousand, nine hundred ninety-two".