23995561 has 8 divisors (see below), whose sum is σ = 24276224. Its totient is φ = 23716800.

The previous prime is 23995547. The next prime is 23995567. The reversal of 23995561 is 16559932.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23995561 - 2⁵ = 23995529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23995567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55201 + ... + 55633.

It is an arithmetic number, because the mean of its divisors is an integer number (3034528).

Almost surely, 2^23995561 is an apocalyptic number.

It is an amenable number.

23995561 is a deficient number, since it is larger than the sum of its proper divisors (280663).

23995561 is a wasteful number, since it uses less digits than its factorization.

23995561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951.

The product of its digits is 72900, while the sum is 40.

The square root of 23995561 is about 4898.5264110751. The cubic root of 23995561 is about 288.4321292265.

The spelling of 23995561 in words is "twenty-three million, nine hundred ninety-five thousand, five hundred sixty-one".