22445431 has 2 divisors, whose sum is σ = 22445432. Its totient is φ = 22445430.

The previous prime is 22445419. The next prime is 22445459. The reversal of 22445431 is 13454422.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22445431 - 2¹⁷ = 22314359 is a prime.

It is a super-2 number, since 2×22445431² = 1007594745551522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22445396 and 22445405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22445231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11222715 + 11222716.

It is an arithmetic number, because the mean of its divisors is an integer number (11222716).

Almost surely, 2^22445431 is an apocalyptic number.

22445431 is a deficient number, since it is larger than the sum of its proper divisors (1).

22445431 is an equidigital number, since it uses as much as digits as its factorization.

22445431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 25.

The square root of 22445431 is about 4737.6609207498. The cubic root of 22445431 is about 282.0823954862.

Adding to 22445431 its reverse (13454422), we get a palindrome (35899853).

The spelling of 22445431 in words is "twenty-two million, four hundred forty-five thousand, four hundred thirty-one".