222917421 has 4 divisors (see below), whose sum is σ = 297223232. Its totient is φ = 148611612.

The previous prime is 222917419. The next prime is 222917467. The reversal of 222917421 is 124719222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 222917421 - 2¹ = 222917419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222917411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37152901 + ... + 37152906.

It is an arithmetic number, because the mean of its divisors is an integer number (74305808).

Almost surely, 2^222917421 is an apocalyptic number.

It is an amenable number.

222917421 is a deficient number, since it is larger than the sum of its proper divisors (74305811).

222917421 is an equidigital number, since it uses as much as digits as its factorization.

222917421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74305810.

The product of its digits is 4032, while the sum is 30.

The square root of 222917421 is about 14930.4193176213. The cubic root of 222917421 is about 606.3378367647.

The spelling of 222917421 in words is "two hundred twenty-two million, nine hundred seventeen thousand, four hundred twenty-one".