216383756 has 6 divisors (see below), whose sum is σ = 378671580. Its totient is φ = 108191876.

The previous prime is 216383749. The next prime is 216383771. The reversal of 216383756 is 657383612.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27047966 + ... + 27047973.

It is an arithmetic number, because the mean of its divisors is an integer number (63111930).

Almost surely, 2^216383756 is an apocalyptic number.

It is an amenable number.

216383756 is a deficient number, since it is larger than the sum of its proper divisors (162287824).

216383756 is a wasteful number, since it uses less digits than its factorization.

216383756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54095943 (or 54095941 counting only the distinct ones).

The product of its digits is 181440, while the sum is 41.

The square root of 216383756 is about 14709.9883072693. The cubic root of 216383756 is about 600.3551194052.

The spelling of 216383756 in words is "two hundred sixteen million, three hundred eighty-three thousand, seven hundred fifty-six".