23113731 has 4 divisors (see below), whose sum is σ = 30818312. Its totient is φ = 15409152.

The previous prime is 23113687. The next prime is 23113751. The reversal of 23113731 is 13731132.

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

It is not a de Polignac number, because 23113731 - 2⁷ = 23113603 is a prime.

It is a super-2 number, since 2×23113731² = 1068489121480722, 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 = 23113698 and 23113707.

It is not an unprimeable number, because it can be changed into a prime (23113751) 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, 3852286 + ... + 3852291.

It is an arithmetic number, because the mean of its divisors is an integer number (7704578).

Almost surely, 2^23113731 is an apocalyptic number.

23113731 is a deficient number, since it is larger than the sum of its proper divisors (7704581).

23113731 is an equidigital number, since it uses as much as digits as its factorization.

23113731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7704580.

The product of its digits is 378, while the sum is 21.

The square root of 23113731 is about 4807.6741778120. The cubic root of 23113731 is about 284.8546750632.

Adding to 23113731 its reverse (13731132), we get a palindrome (36844863).

The spelling of 23113731 in words is "twenty-three million, one hundred thirteen thousand, seven hundred thirty-one".