216902157 has 32 divisors (see below), whose sum is σ = 311377920. Its totient is φ = 134274672.

The previous prime is 216902137. The next prime is 216902171. The reversal of 216902157 is 751209612.

It is not a de Polignac number, because 216902157 - 2²⁰ = 215853581 is a prime.

It is a super-2 number, since 2×216902157² = 94093091422505298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216902117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1707828 + ... + 1707954.

It is an arithmetic number, because the mean of its divisors is an integer number (9730560).

Almost surely, 2^216902157 is an apocalyptic number.

It is an amenable number.

216902157 is a deficient number, since it is larger than the sum of its proper divisors (94475763).

216902157 is an equidigital number, since it uses as much as digits as its factorization.

216902157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 216902157 is about 14727.5984804041. The cubic root of 216902157 is about 600.8341702847.

The spelling of 216902157 in words is "two hundred sixteen million, nine hundred two thousand, one hundred fifty-seven".