23313131 has 8 divisors (see below), whose sum is σ = 23559984. Its totient is φ = 23068000.

The previous prime is 23313113. The next prime is 23313149. The reversal of 23313131 is 13131332.

It is an interprime number because it is at equal distance from previous prime (23313113) and next prime (23313149).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23313131 - 2⁶ = 23313067 is a prime.

It is a super-2 number, since 2×23313131² = 1087004154046322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23313161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73385 + ... + 73701.

It is an arithmetic number, because the mean of its divisors is an integer number (2944998).

Almost surely, 2^23313131 is an apocalyptic number.

23313131 is a deficient number, since it is larger than the sum of its proper divisors (246853).

23313131 is a wasteful number, since it uses less digits than its factorization.

23313131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861.

The product of its digits is 162, while the sum is 17.

The square root of 23313131 is about 4828.3673223979. The cubic root of 23313131 is about 285.6714689767.

Adding to 23313131 its reverse (13131332), we get a palindrome (36444463).

It can be divided in two parts, 2 and 3313131, that added together give a palindrome (3313133).

The spelling of 23313131 in words is "twenty-three million, three hundred thirteen thousand, one hundred thirty-one".