215464 has 16 divisors (see below), whose sum is σ = 421920. Its totient is φ = 102960.

The previous prime is 215461. The next prime is 215471. The reversal of 215464 is 464512.

It is not an unprimeable number, because it can be changed into a prime (215461) 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, 402 + ... + 769.

It is an arithmetic number, because the mean of its divisors is an integer number (26370).

2²¹⁵⁴⁶⁴ is an apocalyptic number.

It is an amenable number.

215464 is a deficient number, since it is larger than the sum of its proper divisors (206456).

215464 is a wasteful number, since it uses less digits than its factorization.

215464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200 (or 1196 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 215464 is about 464.1809991803. The cubic root of 215464 is about 59.9503292620.

Adding to 215464 its reverse (464512), we get a palindrome (679976).

The spelling of 215464 in words is "two hundred fifteen thousand, four hundred sixty-four".