216552522 has 16 divisors (see below), whose sum is σ = 436939200. Its totient is φ = 71545152.

The previous prime is 216552503. The next prime is 216552559. The reversal of 216552522 is 225255612.

It is a self number, because there is not a number n which added to its sum of digits gives 216552522.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159022 + ... + 160377.

It is an arithmetic number, because the mean of its divisors is an integer number (27308700).

Almost surely, 2^216552522 is an apocalyptic number.

216552522 is an abundant number, since it is smaller than the sum of its proper divisors (220386678).

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

216552522 is a wasteful number, since it uses less digits than its factorization.

216552522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319517.

The product of its digits is 12000, while the sum is 30.

The square root of 216552522 is about 14715.7236315446. The cubic root of 216552522 is about 600.5111588485.

The spelling of 216552522 in words is "two hundred sixteen million, five hundred fifty-two thousand, five hundred twenty-two".