31390877952 has 216 divisors, whose sum is σ = 104199653376. Its totient is φ = 8902729728.

The previous prime is 31390877951. The next prime is 31390877953. The reversal of 31390877952 is 25977809313.

It is an interprime number because it is at equal distance from previous prime (31390877951) and next prime (31390877953).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (31390877951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2202433 + ... + 2216639.

Almost surely, 2^31390877952 is an apocalyptic number.

31390877952 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31390877952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52099826688).

31390877952 is an abundant number, since it is smaller than the sum of its proper divisors (72808775424).

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

31390877952 is a wasteful number, since it uses less digits than its factorization.

31390877952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14373 (or 14356 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The spelling of 31390877952 in words is "thirty-one billion, three hundred ninety million, eight hundred seventy-seven thousand, nine hundred fifty-two".