221050522 has 64 divisors (see below), whose sum is σ = 449372160. Its totient is φ = 78926400.

The previous prime is 221050483. The next prime is 221050537. The reversal of 221050522 is 225050122.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 221050522.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89488 + ... + 91924.

It is an arithmetic number, because the mean of its divisors is an integer number (7021440).

Almost surely, 2^221050522 is an apocalyptic number.

221050522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221050522 is an abundant number, since it is smaller than the sum of its proper divisors (228321638).

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

221050522 is a wasteful number, since it uses less digits than its factorization.

221050522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 221050522 is about 14867.7678889603. The cubic root of 221050522 is about 604.6404274578.

Subtracting from 221050522 its product of nonzero digits (400), we obtain a palindrome (221050122).

The spelling of 221050522 in words is "two hundred twenty-one million, fifty thousand, five hundred twenty-two".