23155807 has 4 divisors (see below), whose sum is σ = 23193136. Its totient is φ = 23118480.

The previous prime is 23155777. The next prime is 23155817. The reversal of 23155807 is 70855132.

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 23155807 - 2⁷ = 23155679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23155817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17718 + ... + 18979.

It is an arithmetic number, because the mean of its divisors is an integer number (5798284).

Almost surely, 2^23155807 is an apocalyptic number.

23155807 is a deficient number, since it is larger than the sum of its proper divisors (37329).

23155807 is an equidigital number, since it uses as much as digits as its factorization.

23155807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37328.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 23155807 is about 4812.0481086539. The cubic root of 23155807 is about 285.0274191328.

The spelling of 23155807 in words is "twenty-three million, one hundred fifty-five thousand, eight hundred seven".