30997512 has 256 divisors, whose sum is σ = 112896000. Its totient is φ = 7651584.

The previous prime is 30997501. The next prime is 30997523. The reversal of 30997512 is 21579903.

It is an interprime number because it is at equal distance from previous prime (30997501) and next prime (30997523).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 373423 + ... + 373505.

It is an arithmetic number, because the mean of its divisors is an integer number (441000).

Almost surely, 2^30997512 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 30997512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56448000).

30997512 is an abundant number, since it is smaller than the sum of its proper divisors (81898488).

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

30997512 is a wasteful number, since it uses less digits than its factorization.

30997512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 30997512 is about 5567.5409293511. The cubic root of 30997512 is about 314.1296609766.

The spelling of 30997512 in words is "thirty million, nine hundred ninety-seven thousand, five hundred twelve".