23957551 has 2 divisors, whose sum is σ = 23957552. Its totient is φ = 23957550.

The previous prime is 23957533. The next prime is 23957581. The reversal of 23957551 is 15575932.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23957551 - 2⁵ = 23957519 is a prime.

It is a super-3 number, since 3×23957551³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23957551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23957501) 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, 11978775 + 11978776.

It is an arithmetic number, because the mean of its divisors is an integer number (11978776).

Almost surely, 2^23957551 is an apocalyptic number.

23957551 is a deficient number, since it is larger than the sum of its proper divisors (1).

23957551 is an equidigital number, since it uses as much as digits as its factorization.

23957551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47250, while the sum is 37.

The square root of 23957551 is about 4894.6451352473. The cubic root of 23957551 is about 288.2797524443.

The spelling of 23957551 in words is "twenty-three million, nine hundred fifty-seven thousand, five hundred fifty-one".