23425517 has 4 divisors (see below), whose sum is σ = 23640540. Its totient is φ = 23210496.

The previous prime is 23425513. The next prime is 23425543. The reversal of 23425517 is 71552432.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17732521 + 5692996 = 4211^2 + 2386^2 .

It is a cyclic number.

It is not a de Polignac number, because 23425517 - 2² = 23425513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23425517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23425513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107348 + ... + 107565.

It is an arithmetic number, because the mean of its divisors is an integer number (5910135).

Almost surely, 2^23425517 is an apocalyptic number.

It is an amenable number.

23425517 is a deficient number, since it is larger than the sum of its proper divisors (215023).

23425517 is a wasteful number, since it uses less digits than its factorization.

23425517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215022.

The product of its digits is 8400, while the sum is 29.

The square root of 23425517 is about 4839.9914256122. The cubic root of 23425517 is about 286.1297803746.

Adding to 23425517 its reverse (71552432), we get a palindrome (94977949).

The spelling of 23425517 in words is "twenty-three million, four hundred twenty-five thousand, five hundred seventeen".