23172563 has 2 divisors, whose sum is σ = 23172564. Its totient is φ = 23172562.

The previous prime is 23172559. The next prime is 23172577. The reversal of 23172563 is 36527132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23172563 - 2² = 23172559 is a prime.

It is not a weakly prime, because it can be changed into another prime (23172763) 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, 11586281 + 11586282.

It is an arithmetic number, because the mean of its divisors is an integer number (11586282).

Almost surely, 2^23172563 is an apocalyptic number.

23172563 is a deficient number, since it is larger than the sum of its proper divisors (1).

23172563 is an equidigital number, since it uses as much as digits as its factorization.

23172563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 29.

The square root of 23172563 is about 4813.7888404042. The cubic root of 23172563 is about 285.0961530493.

Adding to 23172563 its reverse (36527132), we get a palindrome (59699695).

The spelling of 23172563 in words is "twenty-three million, one hundred seventy-two thousand, five hundred sixty-three".