216635372 has 6 divisors (see below), whose sum is σ = 379111908. Its totient is φ = 108317684.

The previous prime is 216635371. The next prime is 216635389. The reversal of 216635372 is 273536612.

It is not an unprimeable number, because it can be changed into a prime (216635371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27079418 + ... + 27079425.

It is an arithmetic number, because the mean of its divisors is an integer number (63185318).

Almost surely, 2^216635372 is an apocalyptic number.

It is an amenable number.

216635372 is a deficient number, since it is larger than the sum of its proper divisors (162476536).

216635372 is a wasteful number, since it uses less digits than its factorization.

216635372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54158847 (or 54158845 counting only the distinct ones).

The product of its digits is 45360, while the sum is 35.

The square root of 216635372 is about 14718.5383785211. The cubic root of 216635372 is about 600.5877315056.

The spelling of 216635372 in words is "two hundred sixteen million, six hundred thirty-five thousand, three hundred seventy-two".