23431613 has 6 divisors (see below), whose sum is σ = 23762394. Its totient is φ = 23105376.

The previous prime is 23431607. The next prime is 23431631. The reversal of 23431613 is 31613432.

It can be written as a sum of positive squares in 3 ways, for example, as 4439449 + 18992164 = 2107^2 + 4358^2 .

It is not a de Polignac number, because 23431613 - 2⁸ = 23431357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23431643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3131 + ... + 7527.

It is an arithmetic number, because the mean of its divisors is an integer number (3960399).

Almost surely, 2^23431613 is an apocalyptic number.

It is an amenable number.

23431613 is a deficient number, since it is larger than the sum of its proper divisors (330781).

23431613 is an frugal number, since it uses more digits than its factorization.

23431613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4543 (or 4470 counting only the distinct ones).

The product of its digits is 1296, while the sum is 23.

The square root of 23431613 is about 4840.6211378293. The cubic root of 23431613 is about 286.1545979822.

The spelling of 23431613 in words is "twenty-three million, four hundred thirty-one thousand, six hundred thirteen".