23355881 has 4 divisors (see below), whose sum is σ = 23796612. Its totient is φ = 22915152.

The previous prime is 23355869. The next prime is 23355887. The reversal of 23355881 is 18855332.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13690000 + 9665881 = 3700^2 + 3109^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23355881 is a prime.

It is a super-2 number, since 2×23355881² = 1090994354572322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23355887) 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, 220286 + ... + 220391.

It is an arithmetic number, because the mean of its divisors is an integer number (5949153).

Almost surely, 2^23355881 is an apocalyptic number.

It is an amenable number.

23355881 is a deficient number, since it is larger than the sum of its proper divisors (440731).

23355881 is an equidigital number, since it uses as much as digits as its factorization.

23355881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440730.

The product of its digits is 28800, while the sum is 35.

The square root of 23355881 is about 4832.7922570704. The cubic root of 23355881 is about 285.8459771843.

The spelling of 23355881 in words is "twenty-three million, three hundred fifty-five thousand, eight hundred eighty-one".