65215015 has 8 divisors (see below), whose sum is σ = 78550560. Its totient is φ = 51976992.

The previous prime is 65215013. The next prime is 65215019. The reversal of 65215015 is 51051256.

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 65215015 - 2¹ = 65215013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65215013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22899 + ... + 25588.

It is an arithmetic number, because the mean of its divisors is an integer number (9818820).

Almost surely, 2^65215015 is an apocalyptic number.

65215015 is a deficient number, since it is larger than the sum of its proper divisors (13335545).

65215015 is a wasteful number, since it uses less digits than its factorization.

65215015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48761.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 65215015 is about 8075.5814032180. The cubic root of 65215015 is about 402.5154296260.

The spelling of 65215015 in words is "sixty-five million, two hundred fifteen thousand, fifteen".