23155637 has 2 divisors, whose sum is σ = 23155638. Its totient is φ = 23155636.

The previous prime is 23155597. The next prime is 23155663. The reversal of 23155637 is 73655132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11771761 + 11383876 = 3431^2 + 3374^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23155637 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23155697) 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, 11577818 + 11577819.

It is an arithmetic number, because the mean of its divisors is an integer number (11577819).

Almost surely, 2^23155637 is an apocalyptic number.

It is an amenable number.

23155637 is a deficient number, since it is larger than the sum of its proper divisors (1).

23155637 is an equidigital number, since it uses as much as digits as its factorization.

23155637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 32.

The square root of 23155637 is about 4812.0304446252. The cubic root of 23155637 is about 285.0267216147.

The spelling of 23155637 in words is "twenty-three million, one hundred fifty-five thousand, six hundred thirty-seven".