216372064 has 24 divisors (see below), whose sum is σ = 439725888. Its totient is φ = 104695680.

The previous prime is 216372049. The next prime is 216372077. The reversal of 216372064 is 460273612.

It is a Harshad number since it is a multiple of its sum of digits (31).

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 3 ways as a sum of consecutive naturals, for example, 108067 + ... + 110050.

It is an arithmetic number, because the mean of its divisors is an integer number (18321912).

Almost surely, 2^216372064 is an apocalyptic number.

It is an amenable number.

216372064 is an abundant number, since it is smaller than the sum of its proper divisors (223353824).

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

216372064 is a wasteful number, since it uses less digits than its factorization.

216372064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218158 (or 218150 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 216372064 is about 14709.5908848615. The cubic root of 216372064 is about 600.3443060881.

The spelling of 216372064 in words is "two hundred sixteen million, three hundred seventy-two thousand, sixty-four".