222663421 has 16 divisors (see below), whose sum is σ = 239016960. Its totient is φ = 206962560.

The previous prime is 222663409. The next prime is 222663457. The reversal of 222663421 is 124366222.

It is a de Polignac number, because none of the positive numbers 2^k-222663421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222663421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222663401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208936 + ... + 209998.

It is an arithmetic number, because the mean of its divisors is an integer number (14938560).

Almost surely, 2^222663421 is an apocalyptic number.

It is an amenable number.

222663421 is a deficient number, since it is larger than the sum of its proper divisors (16353539).

222663421 is a wasteful number, since it uses less digits than its factorization.

222663421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356.

The product of its digits is 6912, while the sum is 28.

The square root of 222663421 is about 14921.9107690671. The cubic root of 222663421 is about 606.1074549764.

The spelling of 222663421 in words is "two hundred twenty-two million, six hundred sixty-three thousand, four hundred twenty-one".