23117331 has 16 divisors (see below), whose sum is σ = 32979744. Its totient is φ = 14352384.

The previous prime is 23117329. The next prime is 23117389. The reversal of 23117331 is 13371132.

It is not a de Polignac number, because 23117331 - 2¹ = 23117329 is a prime.

It is a super-2 number, since 2×23117331² = 1068821985127122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23117298 and 23117307.

It is not an unprimeable number, because it can be changed into a prime (23117431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2611 + ... + 7283.

It is an arithmetic number, because the mean of its divisors is an integer number (2061234).

Almost surely, 2^23117331 is an apocalyptic number.

23117331 is a deficient number, since it is larger than the sum of its proper divisors (9862413).

23117331 is a wasteful number, since it uses less digits than its factorization.

23117331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4790.

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

The square root of 23117331 is about 4808.0485646466. The cubic root of 23117331 is about 284.8694631502.

Adding to 23117331 its reverse (13371132), we get a palindrome (36488463).

The spelling of 23117331 in words is "twenty-three million, one hundred seventeen thousand, three hundred thirty-one".