222549421 has 4 divisors (see below), whose sum is σ = 222615712. Its totient is φ = 222483132.

The previous prime is 222549419. The next prime is 222549433. The reversal of 222549421 is 124945222.

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 a cyclic number.

It is not a de Polignac number, because 222549421 - 2¹ = 222549419 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 (222519421) 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, 27825 + ... + 34918.

It is an arithmetic number, because the mean of its divisors is an integer number (55653928).

Almost surely, 2^222549421 is an apocalyptic number.

It is an amenable number.

222549421 is a deficient number, since it is larger than the sum of its proper divisors (66291).

222549421 is an equidigital number, since it uses as much as digits as its factorization.

222549421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66290.

The product of its digits is 11520, while the sum is 31.

The square root of 222549421 is about 14918.0903938808. The cubic root of 222549421 is about 606.0039983107.

The spelling of 222549421 in words is "two hundred twenty-two million, five hundred forty-nine thousand, four hundred twenty-one".