23001131 has 4 divisors (see below), whose sum is σ = 23062200. Its totient is φ = 22940064.

The previous prime is 23001109. The next prime is 23001137. The reversal of 23001131 is 13110032.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23001131 is a prime.

It is a super-2 number, since 2×23001131² = 1058104054558322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23001137) 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, 29966 + ... + 30723.

It is an arithmetic number, because the mean of its divisors is an integer number (5765550).

Almost surely, 2^23001131 is an apocalyptic number.

23001131 is a deficient number, since it is larger than the sum of its proper divisors (61069).

23001131 is an equidigital number, since it uses as much as digits as its factorization.

23001131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61068.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 23001131 is about 4795.9494367643. The cubic root of 23001131 is about 284.3913593777.

Adding to 23001131 its reverse (13110032), we get a palindrome (36111163).

It can be divided in two parts, 23001 and 131, that added together give a palindrome (23132).

The spelling of 23001131 in words is "twenty-three million, one thousand, one hundred thirty-one".