216711452 has 24 divisors (see below), whose sum is σ = 393254400. Its totient is φ = 104384880.

The previous prime is 216711449. The next prime is 216711493. The reversal of 216711452 is 254117612.

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 7 ways as a sum of consecutive naturals, for example, 24299 + ... + 31997.

It is an arithmetic number, because the mean of its divisors is an integer number (16385600).

Almost surely, 2^216711452 is an apocalyptic number.

It is an amenable number.

216711452 is a deficient number, since it is larger than the sum of its proper divisors (176542948).

216711452 is a wasteful number, since it uses less digits than its factorization.

216711452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7961 (or 7959 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 216711452 is about 14721.1226474070. The cubic root of 216711452 is about 600.6580299157.

The spelling of 216711452 in words is "two hundred sixteen million, seven hundred eleven thousand, four hundred fifty-two".