23981505 has 8 divisors (see below), whose sum is σ = 38370432. Its totient is φ = 12790128.

The previous prime is 23981501. The next prime is 23981519. The reversal of 23981505 is 50518932.

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

It is not a de Polignac number, because 23981505 - 2² = 23981501 is a prime.

It is a super-2 number, since 2×23981505² = 1150225164130050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23981501) 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, 799369 + ... + 799398.

It is an arithmetic number, because the mean of its divisors is an integer number (4796304).

Almost surely, 2^23981505 is an apocalyptic number.

It is an amenable number.

23981505 is a deficient number, since it is larger than the sum of its proper divisors (14388927).

23981505 is a wasteful number, since it uses less digits than its factorization.

23981505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598775.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 23981505 is about 4897.0914837279. The cubic root of 23981505 is about 288.3757994484.

The spelling of 23981505 in words is "twenty-three million, nine hundred eighty-one thousand, five hundred five".