216156522 has 8 divisors (see below), whose sum is σ = 432313056. Its totient is φ = 72052172.

The previous prime is 216156511. The next prime is 216156527. The reversal of 216156522 is 225651612.

It is a sphenic number, since it is the product of 3 distinct primes.

216156522 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 216156522.

It is not an unprimeable number, because it can be changed into a prime (216156527) 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 in 3 ways as a sum of consecutive naturals, for example, 18013038 + ... + 18013049.

It is an arithmetic number, because the mean of its divisors is an integer number (54039132).

Almost surely, 2^216156522 is an apocalyptic number.

216156522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216156522 is a wasteful number, since it uses less digits than its factorization.

216156522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36026092.

The product of its digits is 7200, while the sum is 30.

The square root of 216156522 is about 14702.2624789520. The cubic root of 216156522 is about 600.1448927851.

The spelling of 216156522 in words is "two hundred sixteen million, one hundred fifty-six thousand, five hundred twenty-two".