215917030 has 48 divisors (see below), whose sum is σ = 457637040. Its totient is φ = 73123008.

The previous prime is 215917019. The next prime is 215917057. The reversal of 215917030 is 30719512.

It is a self number, because there is not a number n which added to its sum of digits gives 215917030.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38016 + ... + 43324.

It is an arithmetic number, because the mean of its divisors is an integer number (9534105).

Almost surely, 2^215917030 is an apocalyptic number.

215917030 is an abundant number, since it is smaller than the sum of its proper divisors (241720010).

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

215917030 is a wasteful number, since it uses less digits than its factorization.

215917030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5413 (or 5406 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 215917030 is about 14694.1154888615. The cubic root of 215917030 is about 599.9231660873.

The spelling of 215917030 in words is "two hundred fifteen million, nine hundred seventeen thousand, thirty".