65115415 has 16 divisors (see below), whose sum is σ = 82150848. Its totient is φ = 49451776.

The previous prime is 65115383. The next prime is 65115419. The reversal of 65115415 is 51451156.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 65115415 - 2⁵ = 65115383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65115419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13689 + ... + 17821.

It is an arithmetic number, because the mean of its divisors is an integer number (5134428).

Almost surely, 2^65115415 is an apocalyptic number.

65115415 is a deficient number, since it is larger than the sum of its proper divisors (17035433).

65115415 is a wasteful number, since it uses less digits than its factorization.

65115415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4298.

The product of its digits is 3000, while the sum is 28.

The square root of 65115415 is about 8069.4123082168. The cubic root of 65115415 is about 402.3104105639.

The spelling of 65115415 in words is "sixty-five million, one hundred fifteen thousand, four hundred fifteen".