216522442 has 16 divisors (see below), whose sum is σ = 342187200. Its totient is φ = 102470400.

The previous prime is 216522419. The next prime is 216522443. The reversal of 216522442 is 244225612.

216522442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 216522442.

It is not an unprimeable number, because it can be changed into a prime (216522443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59059 + ... + 62617.

It is an arithmetic number, because the mean of its divisors is an integer number (21386700).

Almost surely, 2^216522442 is an apocalyptic number.

216522442 is a deficient number, since it is larger than the sum of its proper divisors (125664758).

216522442 is a wasteful number, since it uses less digits than its factorization.

216522442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5181.

The product of its digits is 7680, while the sum is 28.

The square root of 216522442 is about 14714.7015600045. The cubic root of 216522442 is about 600.4833531043.

The spelling of 216522442 in words is "two hundred sixteen million, five hundred twenty-two thousand, four hundred forty-two".