23515117 has 2 divisors, whose sum is σ = 23515118. Its totient is φ = 23515116.

The previous prime is 23515111. The next prime is 23515147. The reversal of 23515117 is 71151532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15139881 + 8375236 = 3891^2 + 2894^2 .

It is a cyclic number.

It is not a de Polignac number, because 23515117 - 2¹¹ = 23513069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23515091 and 23515100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23515111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11757558 + 11757559.

It is an arithmetic number, because the mean of its divisors is an integer number (11757559).

Almost surely, 2^23515117 is an apocalyptic number.

It is an amenable number.

23515117 is a deficient number, since it is larger than the sum of its proper divisors (1).

23515117 is an equidigital number, since it uses as much as digits as its factorization.

23515117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1050, while the sum is 25.

The square root of 23515117 is about 4849.2388062458. The cubic root of 23515117 is about 286.4941211216.

Adding to 23515117 its reverse (71151532), we get a palindrome (94666649).

It can be divided in two parts, 23515 and 117, that added together give a palindrome (23632).

The spelling of 23515117 in words is "twenty-three million, five hundred fifteen thousand, one hundred seventeen".