215091364 has 12 divisors (see below), whose sum is σ = 384418944. Its totient is φ = 105257384.

The previous prime is 215091341. The next prime is 215091367. The reversal of 215091364 is 463190512.

It is not an unprimeable number, because it can be changed into a prime (215091367) 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, 571864 + ... + 572239.

It is an arithmetic number, because the mean of its divisors is an integer number (32034912).

Almost surely, 2^215091364 is an apocalyptic number.

It is an amenable number.

215091364 is a deficient number, since it is larger than the sum of its proper divisors (169327580).

215091364 is a wasteful number, since it uses less digits than its factorization.

215091364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144154 (or 1144152 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 215091364 is about 14665.9934542465. The cubic root of 215091364 is about 599.1574878797.

The spelling of 215091364 in words is "two hundred fifteen million, ninety-one thousand, three hundred sixty-four".