23663551 has 2 divisors, whose sum is σ = 23663552. Its totient is φ = 23663550.

The previous prime is 23663533. The next prime is 23663557. The reversal of 23663551 is 15536632.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23663551 - 2⁹ = 23663039 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 (23663557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11831775 + 11831776.

It is an arithmetic number, because the mean of its divisors is an integer number (11831776).

Almost surely, 2^23663551 is an apocalyptic number.

23663551 is a deficient number, since it is larger than the sum of its proper divisors (1).

23663551 is an equidigital number, since it uses as much as digits as its factorization.

23663551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 31.

The square root of 23663551 is about 4864.5196062921. The cubic root of 23663551 is about 287.0956675408.

The spelling of 23663551 in words is "twenty-three million, six hundred sixty-three thousand, five hundred fifty-one".