23155647 has 8 divisors (see below), whose sum is σ = 31456944. Its totient is φ = 15145728.

The previous prime is 23155637. The next prime is 23155663. The reversal of 23155647 is 74655132.

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

It is not a de Polignac number, because 23155647 - 2⁷ = 23155519 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23155637) 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, 72658 + ... + 72975.

It is an arithmetic number, because the mean of its divisors is an integer number (3932118).

Almost surely, 2^23155647 is an apocalyptic number.

23155647 is a deficient number, since it is larger than the sum of its proper divisors (8301297).

23155647 is a wasteful number, since it uses less digits than its factorization.

23155647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145689.

The product of its digits is 25200, while the sum is 33.

The square root of 23155647 is about 4812.0314836875. The cubic root of 23155647 is about 285.0267626453.

The spelling of 23155647 in words is "twenty-three million, one hundred fifty-five thousand, six hundred forty-seven".