222724855 has 4 divisors (see below), whose sum is σ = 267269832. Its totient is φ = 178179880.

The previous prime is 222724819. The next prime is 222724877. The reversal of 222724855 is 558427222.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 222724855 - 2¹⁷ = 222593783 is a prime.

It is a super-2 number, since 2×222724855² = 99212722069542050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22272481 + ... + 22272490.

It is an arithmetic number, because the mean of its divisors is an integer number (66817458).

Almost surely, 2^222724855 is an apocalyptic number.

222724855 is a deficient number, since it is larger than the sum of its proper divisors (44544977).

222724855 is an equidigital number, since it uses as much as digits as its factorization.

222724855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44544976.

The product of its digits is 89600, while the sum is 37.

The square root of 222724855 is about 14923.9691436293. The cubic root of 222724855 is about 606.1631925873.

The spelling of 222724855 in words is "two hundred twenty-two million, seven hundred twenty-four thousand, eight hundred fifty-five".