65256571 has 4 divisors (see below), whose sum is σ = 65342200. Its totient is φ = 65170944.

The previous prime is 65256547. The next prime is 65256617. The reversal of 65256571 is 17565256.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65256571 - 2¹⁵ = 65223803 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65256571.

It is not an unprimeable number, because it can be changed into a prime (65253571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41661 + ... + 43198.

It is an arithmetic number, because the mean of its divisors is an integer number (16335550).

Almost surely, 2^65256571 is an apocalyptic number.

65256571 is a deficient number, since it is larger than the sum of its proper divisors (85629).

65256571 is an equidigital number, since it uses as much as digits as its factorization.

65256571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85628.

The product of its digits is 63000, while the sum is 37.

The square root of 65256571 is about 8078.1539351513. The cubic root of 65256571 is about 402.6009077916.

The spelling of 65256571 in words is "sixty-five million, two hundred fifty-six thousand, five hundred seventy-one".