222621045 has 16 divisors (see below), whose sum is σ = 365821440. Its totient is φ = 115521984.

The previous prime is 222621029. The next prime is 222621053. The reversal of 222621045 is 540126222.

It is a happy number.

It is not a de Polignac number, because 222621045 - 2⁴ = 222621029 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200005 + ... + 201114.

It is an arithmetic number, because the mean of its divisors is an integer number (22863840).

Almost surely, 2^222621045 is an apocalyptic number.

It is an amenable number.

222621045 is a deficient number, since it is larger than the sum of its proper divisors (143200395).

222621045 is a wasteful number, since it uses less digits than its factorization.

222621045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401164.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 222621045 is about 14920.4907761105. The cubic root of 222621045 is about 606.0690022616.

Adding to 222621045 its reverse (540126222), we get a palindrome (762747267).

The spelling of 222621045 in words is "two hundred twenty-two million, six hundred twenty-one thousand, forty-five".