215715164 has 24 divisors (see below), whose sum is σ = 431756640. Its totient is φ = 92379456.

The previous prime is 215715161. The next prime is 215715169. The reversal of 215715164 is 461517512.

It is a self number, because there is not a number n which added to its sum of digits gives 215715164.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215715161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54914 + ... + 58710.

It is an arithmetic number, because the mean of its divisors is an integer number (17989860).

Almost surely, 2^215715164 is an apocalyptic number.

It is an amenable number.

215715164 is an abundant number, since it is smaller than the sum of its proper divisors (216041476).

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

215715164 is a wasteful number, since it uses less digits than its factorization.

215715164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5837 (or 5835 counting only the distinct ones).

The product of its digits is 8400, while the sum is 32.

The square root of 215715164 is about 14687.2449424662. The cubic root of 215715164 is about 599.7361469493.

The spelling of 215715164 in words is "two hundred fifteen million, seven hundred fifteen thousand, one hundred sixty-four".