65415715 has 4 divisors (see below), whose sum is σ = 78498864. Its totient is φ = 52332568.

The previous prime is 65415709. The next prime is 65415739. The reversal of 65415715 is 51751456.

65415715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 65415715 - 2⁵ = 65415683 is a prime.

It is a super-2 number, since 2×65415715² = 8558431537922450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6541567 + ... + 6541576.

It is an arithmetic number, because the mean of its divisors is an integer number (19624716).

Almost surely, 2^65415715 is an apocalyptic number.

65415715 is a deficient number, since it is larger than the sum of its proper divisors (13083149).

65415715 is a wasteful number, since it uses less digits than its factorization.

65415715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13083148.

The product of its digits is 21000, while the sum is 34.

The square root of 65415715 is about 8087.9982072204. The cubic root of 65415715 is about 402.9279221376.

The spelling of 65415715 in words is "sixty-five million, four hundred fifteen thousand, seven hundred fifteen".