65521713 has 16 divisors (see below), whose sum is σ = 89948160. Its totient is φ = 42403536.

The previous prime is 65521691. The next prime is 65521717. The reversal of 65521713 is 31712556.

It is not a de Polignac number, because 65521713 - 2¹⁴ = 65505329 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65521717) 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, 16078 + ... + 19736.

It is an arithmetic number, because the mean of its divisors is an integer number (5621760).

Almost surely, 2^65521713 is an apocalyptic number.

It is an amenable number.

65521713 is a deficient number, since it is larger than the sum of its proper divisors (24426447).

65521713 is a wasteful number, since it uses less digits than its factorization.

65521713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3836.

The product of its digits is 6300, while the sum is 30.

The square root of 65521713 is about 8094.5483505876. The cubic root of 65521713 is about 403.1454361613.

The spelling of 65521713 in words is "sixty-five million, five hundred twenty-one thousand, seven hundred thirteen".