23531647 has 2 divisors, whose sum is σ = 23531648. Its totient is φ = 23531646.

The previous prime is 23531617. The next prime is 23531657. The reversal of 23531647 is 74613532.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23531647 - 2¹¹ = 23529599 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 (23531617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11765823 + 11765824.

It is an arithmetic number, because the mean of its divisors is an integer number (11765824).

Almost surely, 2^23531647 is an apocalyptic number.

23531647 is a deficient number, since it is larger than the sum of its proper divisors (1).

23531647 is an equidigital number, since it uses as much as digits as its factorization.

23531647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 31.

The square root of 23531647 is about 4850.9428980354. The cubic root of 23531647 is about 286.5612359423.

The spelling of 23531647 in words is "twenty-three million, five hundred thirty-one thousand, six hundred forty-seven".