215323164 has 48 divisors (see below), whose sum is σ = 637996800. Its totient is φ = 61520688.

The previous prime is 215323127. The next prime is 215323177. The reversal of 215323164 is 461323512.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141654 + ... + 143165.

It is an arithmetic number, because the mean of its divisors is an integer number (13291600).

Almost surely, 2^215323164 is an apocalyptic number.

It is an amenable number.

215323164 is an abundant number, since it is smaller than the sum of its proper divisors (422673636).

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

215323164 is a wasteful number, since it uses less digits than its factorization.

215323164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284839 (or 284831 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 215323164 is about 14673.8939617267. The cubic root of 215323164 is about 599.3726442699.

Adding to 215323164 its reverse (461323512), we get a palindrome (676646676).

The spelling of 215323164 in words is "two hundred fifteen million, three hundred twenty-three thousand, one hundred sixty-four".