65215085 has 16 divisors (see below), whose sum is σ = 86075136. Its totient is φ = 47131968.

The previous prime is 65215081. The next prime is 65215091. The reversal of 65215085 is 58051256.

It is not a de Polignac number, because 65215085 - 2² = 65215081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65215081) 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, 7619 + ... + 13728.

It is an arithmetic number, because the mean of its divisors is an integer number (5379696).

Almost surely, 2^65215085 is an apocalyptic number.

65215085 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65215085 is a deficient number, since it is larger than the sum of its proper divisors (20860051).

65215085 is a wasteful number, since it uses less digits than its factorization.

65215085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21412.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 65215085 is about 8075.5857372701. The cubic root of 65215085 is about 402.5155736422.

The spelling of 65215085 in words is "sixty-five million, two hundred fifteen thousand, eighty-five".