216515157 has 16 divisors (see below), whose sum is σ = 298643520. Its totient is φ = 139421952.

The previous prime is 216515147. The next prime is 216515171. The reversal of 216515157 is 751515612.

It is a happy number.

It is not a de Polignac number, because 216515157 - 2¹⁴ = 216498773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216515107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8413 + ... + 22445.

It is an arithmetic number, because the mean of its divisors is an integer number (18665220).

Almost surely, 2^216515157 is an apocalyptic number.

It is an amenable number.

216515157 is a deficient number, since it is larger than the sum of its proper divisors (82128363).

216515157 is a wasteful number, since it uses less digits than its factorization.

216515157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14212.

The product of its digits is 10500, while the sum is 33.

The square root of 216515157 is about 14714.4540163745. The cubic root of 216515157 is about 600.4766185133.

The spelling of 216515157 in words is "two hundred sixteen million, five hundred fifteen thousand, one hundred fifty-seven".