23022731 has 2 divisors, whose sum is σ = 23022732. Its totient is φ = 23022730.

The previous prime is 23022721. The next prime is 23022749. The reversal of 23022731 is 13722032.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23022731 - 2²² = 18828427 is a prime.

It is a super-2 number, since 2×23022731² = 1060092285396722, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (23022721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11511365 + 11511366.

It is an arithmetic number, because the mean of its divisors is an integer number (11511366).

Almost surely, 2^23022731 is an apocalyptic number.

23022731 is a deficient number, since it is larger than the sum of its proper divisors (1).

23022731 is an equidigital number, since it uses as much as digits as its factorization.

23022731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 23022731 is about 4798.2008086365. The cubic root of 23022731 is about 284.4803540084.

Adding to 23022731 its reverse (13722032), we get a palindrome (36744763).

The spelling of 23022731 in words is "twenty-three million, twenty-two thousand, seven hundred thirty-one".