23155651 has 4 divisors (see below), whose sum is σ = 23259712. Its totient is φ = 23051592.

The previous prime is 23155637. The next prime is 23155663. The reversal of 23155651 is 15655132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23155651 - 2⁷ = 23155523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23155151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51696 + ... + 52141.

It is an arithmetic number, because the mean of its divisors is an integer number (5814928).

Almost surely, 2^23155651 is an apocalyptic number.

23155651 is a deficient number, since it is larger than the sum of its proper divisors (104061).

23155651 is a wasteful number, since it uses less digits than its factorization.

23155651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104060.

The product of its digits is 4500, while the sum is 28.

The square root of 23155651 is about 4812.0318993124. The cubic root of 23155651 is about 285.0267790575.

The spelling of 23155651 in words is "twenty-three million, one hundred fifty-five thousand, six hundred fifty-one".