215364 has 24 divisors (see below), whose sum is σ = 510048. Its totient is φ = 70720.

The previous prime is 215359. The next prime is 215381. The reversal of 215364 is 463512.

It is a happy number.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 215364.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 215364.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1504 + ... + 1640.

It is an arithmetic number, because the mean of its divisors is an integer number (21252).

2²¹⁵³⁶⁴ is an apocalyptic number.

It is an amenable number.

215364 is an abundant number, since it is smaller than the sum of its proper divisors (294684).

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

215364 is a wasteful number, since it uses less digits than its factorization.

215364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 273 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 215364 is about 464.0732700770. The cubic root of 215364 is about 59.9410532180.

Adding to 215364 its reverse (463512), we get a palindrome (678876).

The spelling of 215364 in words is "two hundred fifteen thousand, three hundred sixty-four".