215074864 has 10 divisors (see below), whose sum is σ = 416707580. Its totient is φ = 107537424.

The previous prime is 215074861. The next prime is 215074877. The reversal of 215074864 is 468470512.

It is not an unprimeable number, because it can be changed into a prime (215074861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6721074 + ... + 6721105.

It is an arithmetic number, because the mean of its divisors is an integer number (41670758).

Almost surely, 2^215074864 is an apocalyptic number.

It is an amenable number.

215074864 is a deficient number, since it is larger than the sum of its proper divisors (201632716).

215074864 is a wasteful number, since it uses less digits than its factorization.

215074864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13442187 (or 13442181 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 215074864 is about 14665.4309176376. The cubic root of 215074864 is about 599.1421667138.

The spelling of 215074864 in words is "two hundred fifteen million, seventy-four thousand, eight hundred sixty-four".