222972391 has 32 divisors (see below), whose sum is σ = 258552000. Its totient is φ = 190955520.

The previous prime is 222972389. The next prime is 222972413. The reversal of 222972391 is 193279222.

It is a cyclic number.

It is not a de Polignac number, because 222972391 - 2¹ = 222972389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222972391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222972311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1496385 + ... + 1496533.

It is an arithmetic number, because the mean of its divisors is an integer number (8079750).

Almost surely, 2^222972391 is an apocalyptic number.

222972391 is a deficient number, since it is larger than the sum of its proper divisors (35579609).

222972391 is a wasteful number, since it uses less digits than its factorization.

222972391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339.

The product of its digits is 27216, while the sum is 37.

The square root of 222972391 is about 14932.2600767600. The cubic root of 222972391 is about 606.3876723368.

The spelling of 222972391 in words is "two hundred twenty-two million, nine hundred seventy-two thousand, three hundred ninety-one".