65051515 has 8 divisors (see below), whose sum is σ = 78140160. Its totient is φ = 51988992.

The previous prime is 65051509. The next prime is 65051531. The reversal of 65051515 is 51515056.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65051515 - 2⁷ = 65051387 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550 + ... + 11419.

It is an arithmetic number, because the mean of its divisors is an integer number (9767520).

Almost surely, 2^65051515 is an apocalyptic number.

65051515 is a deficient number, since it is larger than the sum of its proper divisors (13088645).

65051515 is a wasteful number, since it uses less digits than its factorization.

65051515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13061.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 65051515 is about 8065.4519402201. The cubic root of 65051515 is about 402.1787671372.

The spelling of 65051515 in words is "sixty-five million, fifty-one thousand, five hundred fifteen".