23315563 has 2 divisors, whose sum is σ = 23315564. Its totient is φ = 23315562.

The previous prime is 23315497. The next prime is 23315569. The reversal of 23315563 is 36551332.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23315563 - 2¹³ = 23307371 is a prime.

It is not a weakly prime, because it can be changed into another prime (23315569) 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, 11657781 + 11657782.

It is an arithmetic number, because the mean of its divisors is an integer number (11657782).

Almost surely, 2^23315563 is an apocalyptic number.

23315563 is a deficient number, since it is larger than the sum of its proper divisors (1).

23315563 is an equidigital number, since it uses as much as digits as its factorization.

23315563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 28.

The square root of 23315563 is about 4828.6191607954. The cubic root of 23315563 is about 285.6814022750.

Adding to 23315563 its reverse (36551332), we get a palindrome (59866895).

The spelling of 23315563 in words is "twenty-three million, three hundred fifteen thousand, five hundred sixty-three".