23531237 has 2 divisors, whose sum is σ = 23531238. Its totient is φ = 23531236.

The previous prime is 23531219. The next prime is 23531239. The reversal of 23531237 is 73213532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23049601 + 481636 = 4801^2 + 694^2 .

It is a cyclic number.

It is not a de Polignac number, because 23531237 - 2⁸ = 23530981 is a prime.

It is a super-2 number, since 2×23531237² = 1107438229500338, which contains 22 as substring.

Together with 23531239, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23531239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11765618 + 11765619.

It is an arithmetic number, because the mean of its divisors is an integer number (11765619).

Almost surely, 2^23531237 is an apocalyptic number.

It is an amenable number.

23531237 is a deficient number, since it is larger than the sum of its proper divisors (1).

23531237 is an equidigital number, since it uses as much as digits as its factorization.

23531237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 26.

The square root of 23531237 is about 4850.9006380259. The cubic root of 23531237 is about 286.5595716476.

Adding to 23531237 its reverse (73213532), we get a palindrome (96744769).

The spelling of 23531237 in words is "twenty-three million, five hundred thirty-one thousand, two hundred thirty-seven".