23115817 has 2 divisors, whose sum is σ = 23115818. Its totient is φ = 23115816.

The previous prime is 23115809. The next prime is 23115821. The reversal of 23115817 is 71851132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14930496 + 8185321 = 3864^2 + 2861^2 .

It is a cyclic number.

It is not a de Polignac number, because 23115817 - 2³ = 23115809 is a prime.

It is equal to p_1455076 and since 23115817 and 1455076 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (23115877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11557908 + 11557909.

It is an arithmetic number, because the mean of its divisors is an integer number (11557909).

Almost surely, 2^23115817 is an apocalyptic number.

It is an amenable number.

23115817 is a deficient number, since it is larger than the sum of its proper divisors (1).

23115817 is an equidigital number, since it uses as much as digits as its factorization.

23115817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 28.

The square root of 23115817 is about 4807.8911177355. The cubic root of 23115817 is about 284.8632441252.

Adding to 23115817 its reverse (71851132), we get a palindrome (94966949).

It can be divided in two parts, 23115 and 817, that added together give a palindrome (23932).

The spelling of 23115817 in words is "twenty-three million, one hundred fifteen thousand, eight hundred seventeen".