23112131 has 4 divisors (see below), whose sum is σ = 26413872. Its totient is φ = 19810392.

The previous prime is 23112121. The next prime is 23112137. The reversal of 23112131 is 13121132.

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

It is not a de Polignac number, because 23112131 - 2¹⁰ = 23111107 is a prime.

It is a super-2 number, since 2×23112131² = 1068341198722322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23112137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1650860 + ... + 1650873.

It is an arithmetic number, because the mean of its divisors is an integer number (6603468).

Almost surely, 2^23112131 is an apocalyptic number.

23112131 is a deficient number, since it is larger than the sum of its proper divisors (3301741).

23112131 is an equidigital number, since it uses as much as digits as its factorization.

23112131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3301740.

The product of its digits is 36, while the sum is 14.

The square root of 23112131 is about 4807.5077743047. The cubic root of 23112131 is about 284.8481020872.

Adding to 23112131 its reverse (13121132), we get a palindrome (36233263).

Subtracting from 23112131 its reverse (13121132), we obtain a palindrome (9990999).

The spelling of 23112131 in words is "twenty-three million, one hundred twelve thousand, one hundred thirty-one".