22699931 has 2 divisors, whose sum is σ = 22699932. Its totient is φ = 22699930.

The previous prime is 22699921. The next prime is 22699933. The reversal of 22699931 is 13999622.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22699931 - 2⁶ = 22699867 is a prime.

It is a super-2 number, since 2×22699931² = 1030573734809522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 22699933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22699933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11349965 + 11349966.

It is an arithmetic number, because the mean of its divisors is an integer number (11349966).

Almost surely, 2^22699931 is an apocalyptic number.

22699931 is a deficient number, since it is larger than the sum of its proper divisors (1).

22699931 is an equidigital number, since it uses as much as digits as its factorization.

22699931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 41.

The square root of 22699931 is about 4764.4444586961. Note that the first 4 decimals coincide. The cubic root of 22699931 is about 283.1445319657.

The spelling of 22699931 in words is "twenty-two million, six hundred ninety-nine thousand, nine hundred thirty-one".