222522921 has 24 divisors (see below), whose sum is σ = 331778304. Its totient is φ = 143609760.

The previous prime is 222522913. The next prime is 222522931. The reversal of 222522921 is 129225222.

222522921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 222522921 - 2³ = 222522913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222522931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68680 + ... + 71846.

It is an arithmetic number, because the mean of its divisors is an integer number (13824096).

Almost surely, 2^222522921 is an apocalyptic number.

It is an amenable number.

222522921 is a deficient number, since it is larger than the sum of its proper divisors (109255383).

222522921 is a wasteful number, since it uses less digits than its factorization.

222522921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3421 (or 3418 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 222522921 is about 14917.2021840558. The cubic root of 222522921 is about 605.9799441129.

The spelling of 222522921 in words is "two hundred twenty-two million, five hundred twenty-two thousand, nine hundred twenty-one".