222255021 has 8 divisors (see below), whose sum is σ = 296409024. Its totient is φ = 148135520.

The previous prime is 222255017. The next prime is 222255029. The reversal of 222255021 is 120552222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222255021 - 2² = 222255017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222255029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19681 + ... + 28841.

It is an arithmetic number, because the mean of its divisors is an integer number (37051128).

Almost surely, 2^222255021 is an apocalyptic number.

It is an amenable number.

222255021 is a deficient number, since it is larger than the sum of its proper divisors (74154003).

222255021 is an equidigital number, since it uses as much as digits as its factorization.

222255021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17251.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 222255021 is about 14908.2199138596. The cubic root of 222255021 is about 605.7366624787.

The spelling of 222255021 in words is "two hundred twenty-two million, two hundred fifty-five thousand, twenty-one".