215630164 has 12 divisors (see below), whose sum is σ = 397213600. Its totient is φ = 102140568.

The previous prime is 215630161. The next prime is 215630197. The reversal of 215630164 is 461036512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215630161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1418544 + ... + 1418695.

Almost surely, 2^215630164 is an apocalyptic number.

It is an amenable number.

215630164 is a deficient number, since it is larger than the sum of its proper divisors (181583436).

215630164 is a wasteful number, since it uses less digits than its factorization.

215630164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837262 (or 2837260 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 215630164 is about 14684.3509900846. The cubic root of 215630164 is about 599.6573636304.

Adding to 215630164 its reverse (461036512), we get a palindrome (676666676).

The spelling of 215630164 in words is "two hundred fifteen million, six hundred thirty thousand, one hundred sixty-four".