216634136 has 8 divisors (see below), whose sum is σ = 406189020. Its totient is φ = 108317064.

The previous prime is 216634133. The next prime is 216634153. The reversal of 216634136 is 631436612.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216634133) by changing a digit.

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 as a sum of consecutive naturals, namely, 13539626 + ... + 13539641.

Almost surely, 2^216634136 is an apocalyptic number.

It is an amenable number.

216634136 is a deficient number, since it is larger than the sum of its proper divisors (189554884).

216634136 is a wasteful number, since it uses less digits than its factorization.

216634136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27079273 (or 27079269 counting only the distinct ones).

The product of its digits is 15552, while the sum is 32.

The square root of 216634136 is about 14718.4963905964. The cubic root of 216634136 is about 600.5865892977.

The spelling of 216634136 in words is "two hundred sixteen million, six hundred thirty-four thousand, one hundred thirty-six".