22722431 has 2 divisors, whose sum is σ = 22722432. Its totient is φ = 22722430.

The previous prime is 22722419. The next prime is 22722437. The reversal of 22722431 is 13422722.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22722431 is a prime.

It is a super-2 number, since 2×22722431² = 1032617741099522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22722397 and 22722406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22722437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11361215 + 11361216.

It is an arithmetic number, because the mean of its divisors is an integer number (11361216).

Almost surely, 2^22722431 is an apocalyptic number.

22722431 is a deficient number, since it is larger than the sum of its proper divisors (1).

22722431 is an equidigital number, since it uses as much as digits as its factorization.

22722431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 23.

The square root of 22722431 is about 4766.8051145395. The cubic root of 22722431 is about 283.2380513138.

The spelling of 22722431 in words is "twenty-two million, seven hundred twenty-two thousand, four hundred thirty-one".