22137931 has 2 divisors, whose sum is σ = 22137932. Its totient is φ = 22137930.

The previous prime is 22137889. The next prime is 22137953. The reversal of 22137931 is 13973122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22137931 - 2¹³ = 22129739 is a prime.

It is a super-2 number, since 2×22137931² = 980175977921522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22137931.

It is not a weakly prime, because it can be changed into another prime (22137971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11068965 + 11068966.

It is an arithmetic number, because the mean of its divisors is an integer number (11068966).

Almost surely, 2^22137931 is an apocalyptic number.

22137931 is a deficient number, since it is larger than the sum of its proper divisors (1).

22137931 is an equidigital number, since it uses as much as digits as its factorization.

22137931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 28.

The square root of 22137931 is about 4705.0962795675. The cubic root of 22137931 is about 280.7883015218.

The spelling of 22137931 in words is "twenty-two million, one hundred thirty-seven thousand, nine hundred thirty-one".