23511013 has 2 divisors, whose sum is σ = 23511014. Its totient is φ = 23511012.

The previous prime is 23511001. The next prime is 23511023. The reversal of 23511013 is 31011532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23444964 + 66049 = 4842^2 + 257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23511013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23511023) 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, 11755506 + 11755507.

It is an arithmetic number, because the mean of its divisors is an integer number (11755507).

Almost surely, 2^23511013 is an apocalyptic number.

It is an amenable number.

23511013 is a deficient number, since it is larger than the sum of its proper divisors (1).

23511013 is an equidigital number, since it uses as much as digits as its factorization.

23511013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 23511013 is about 4848.8156285840. The cubic root of 23511013 is about 286.4774532581.

Adding to 23511013 its reverse (31011532), we get a palindrome (54522545).

It can be divided in two parts, 2351 and 1013, that added together give a square (3364 = 58²).

The spelling of 23511013 in words is "twenty-three million, five hundred eleven thousand, thirteen".