222972421 has 8 divisors (see below), whose sum is σ = 255893760. Its totient is φ = 190318128.

The previous prime is 222972413. The next prime is 222972433. The reversal of 222972421 is 124279222.

It is a happy number.

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

It is not a de Polignac number, because 222972421 - 2³ = 222972413 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 (222972461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64966 + ... + 68311.

It is an arithmetic number, because the mean of its divisors is an integer number (31986720).

Almost surely, 2^222972421 is an apocalyptic number.

It is an amenable number.

222972421 is a deficient number, since it is larger than the sum of its proper divisors (32921339).

222972421 is a wasteful number, since it uses less digits than its factorization.

222972421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133523.

The product of its digits is 8064, while the sum is 31.

The square root of 222972421 is about 14932.2610812964. The cubic root of 222972421 is about 606.3876995324.

The spelling of 222972421 in words is "two hundred twenty-two million, nine hundred seventy-two thousand, four hundred twenty-one".