22431473 has 2 divisors, whose sum is σ = 22431474. Its totient is φ = 22431472.

The previous prime is 22431439. The next prime is 22431559. The reversal of 22431473 is 37413422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22061809 + 369664 = 4697^2 + 608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22431473 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22431433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11215736 + 11215737.

It is an arithmetic number, because the mean of its divisors is an integer number (11215737).

Almost surely, 2^22431473 is an apocalyptic number.

It is an amenable number.

22431473 is a deficient number, since it is larger than the sum of its proper divisors (1).

22431473 is an equidigital number, since it uses as much as digits as its factorization.

22431473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 26.

The square root of 22431473 is about 4736.1876018587. The cubic root of 22431473 is about 282.0239110889.

Adding to 22431473 its reverse (37413422), we get a palindrome (59844895).

The spelling of 22431473 in words is "twenty-two million, four hundred thirty-one thousand, four hundred seventy-three".