23139311 has 12 divisors (see below), whose sum is σ = 26149968. Its totient is φ = 20427264.

The previous prime is 23139307. The next prime is 23139367. The reversal of 23139311 is 11393132.

It is not a de Polignac number, because 23139311 - 2² = 23139307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23139371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 911 + ... + 6863.

It is an arithmetic number, because the mean of its divisors is an integer number (2179164).

Almost surely, 2^23139311 is an apocalyptic number.

23139311 is a deficient number, since it is larger than the sum of its proper divisors (3010657).

23139311 is a wasteful number, since it uses less digits than its factorization.

23139311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6002 (or 5989 counting only the distinct ones).

The product of its digits is 486, while the sum is 23.

The square root of 23139311 is about 4810.3337722033. Note that the first 3 decimals coincide. The cubic root of 23139311 is about 284.9597193508.

It can be divided in two parts, 2 and 3139311, that added together give a palindrome (3139313).

The spelling of 23139311 in words is "twenty-three million, one hundred thirty-nine thousand, three hundred eleven".