216537364 has 24 divisors (see below), whose sum is σ = 418678848. Its totient is φ = 97468800.

The previous prime is 216537361. The next prime is 216537371. The reversal of 216537364 is 463735612.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216537361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67662 + ... + 70789.

It is an arithmetic number, because the mean of its divisors is an integer number (17444952).

Almost surely, 2^216537364 is an apocalyptic number.

It is an amenable number.

216537364 is a deficient number, since it is larger than the sum of its proper divisors (202141484).

216537364 is a wasteful number, since it uses less digits than its factorization.

216537364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138495 (or 138493 counting only the distinct ones).

The product of its digits is 90720, while the sum is 37.

The square root of 216537364 is about 14715.2085951916. The cubic root of 216537364 is about 600.4971472199.

The spelling of 216537364 in words is "two hundred sixteen million, five hundred thirty-seven thousand, three hundred sixty-four".