23001157 has 2 divisors, whose sum is σ = 23001158. Its totient is φ = 23001156.

The previous prime is 23001149. The next prime is 23001169. The reversal of 23001157 is 75110032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21242881 + 1758276 = 4609^2 + 1326^2 .

It is a cyclic number.

It is not a de Polignac number, because 23001157 - 2³ = 23001149 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 (23001107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11500578 + 11500579.

It is an arithmetic number, because the mean of its divisors is an integer number (11500579).

Almost surely, 2^23001157 is an apocalyptic number.

It is an amenable number.

23001157 is a deficient number, since it is larger than the sum of its proper divisors (1).

23001157 is an equidigital number, since it uses as much as digits as its factorization.

23001157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 23001157 is about 4795.9521473843. The cubic root of 23001157 is about 284.3914665343.

Adding to 23001157 its reverse (75110032), we get a palindrome (98111189).

The spelling of 23001157 in words is "twenty-three million, one thousand, one hundred fifty-seven".