23009131 has 4 divisors (see below), whose sum is σ = 24009552. Its totient is φ = 22008712.

The previous prime is 23009101. The next prime is 23009149. The reversal of 23009131 is 13190032.

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 23009131 - 2⁹ = 23008619 is a prime.

It is a super-2 number, since 2×23009131² = 1058840218750322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23009099 and 23009108.

It is not an unprimeable number, because it can be changed into a prime (23009101) 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, 500176 + ... + 500221.

It is an arithmetic number, because the mean of its divisors is an integer number (6002388).

Almost surely, 2^23009131 is an apocalyptic number.

23009131 is a deficient number, since it is larger than the sum of its proper divisors (1000421).

23009131 is a wasteful number, since it uses less digits than its factorization.

23009131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000420.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 23009131 is about 4796.7834014056. The cubic root of 23009131 is about 284.4243268457.

Adding to 23009131 its reverse (13190032), we get a palindrome (36199163).

The spelling of 23009131 in words is "twenty-three million, nine thousand, one hundred thirty-one".