65415525 has 24 divisors (see below), whose sum is σ = 123605184. Its totient is φ = 29904000.

The previous prime is 65415521. The next prime is 65415527. The reversal of 65415525 is 52551456.

It is not a de Polignac number, because 65415525 - 2² = 65415521 is a prime.

It is a super-2 number, since 2×65415525² = 8558381822051250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65415521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61776 + ... + 62825.

It is an arithmetic number, because the mean of its divisors is an integer number (5150216).

Almost surely, 2^65415525 is an apocalyptic number.

It is an amenable number.

65415525 is a deficient number, since it is larger than the sum of its proper divisors (58189659).

65415525 is a wasteful number, since it uses less digits than its factorization.

65415525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124621 (or 124616 counting only the distinct ones).

The product of its digits is 30000, while the sum is 33.

The square root of 65415525 is about 8087.9864614130. The cubic root of 65415525 is about 402.9275320358.

The spelling of 65415525 in words is "sixty-five million, four hundred fifteen thousand, five hundred twenty-five".