23317157 has 2 divisors, whose sum is σ = 23317158. Its totient is φ = 23317156.

The previous prime is 23317153. The next prime is 23317187. The reversal of 23317157 is 75171332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22335076 + 982081 = 4726^2 + 991^2 .

It is a cyclic number.

It is not a de Polignac number, because 23317157 - 2² = 23317153 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 (23317153) 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, 11658578 + 11658579.

It is an arithmetic number, because the mean of its divisors is an integer number (11658579).

Almost surely, 2^23317157 is an apocalyptic number.

It is an amenable number.

23317157 is a deficient number, since it is larger than the sum of its proper divisors (1).

23317157 is an equidigital number, since it uses as much as digits as its factorization.

23317157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4410, while the sum is 29.

The square root of 23317157 is about 4828.7842155143. The cubic root of 23317157 is about 285.6879124585.

Adding to 23317157 its reverse (75171332), we get a palindrome (98488489).

The spelling of 23317157 in words is "twenty-three million, three hundred seventeen thousand, one hundred fifty-seven".