65516215 has 16 divisors (see below), whose sum is σ = 84820608. Its totient is φ = 48395776.

The previous prime is 65516203. The next prime is 65516251. The reversal of 65516215 is 51261556.

It is a cyclic number.

It is not a de Polignac number, because 65516215 - 2¹¹ = 65514167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2767 + ... + 11776.

It is an arithmetic number, because the mean of its divisors is an integer number (5301288).

Almost surely, 2^65516215 is an apocalyptic number.

65516215 is a deficient number, since it is larger than the sum of its proper divisors (19304393).

65516215 is a wasteful number, since it uses less digits than its factorization.

65516215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14618.

The product of its digits is 9000, while the sum is 31.

The square root of 65516215 is about 8094.2087321739. The cubic root of 65516215 is about 403.1341597182.

The spelling of 65516215 in words is "sixty-five million, five hundred sixteen thousand, two hundred fifteen".