65475521 has 4 divisors (see below), whose sum is σ = 65501952. Its totient is φ = 65449092.

The previous prime is 65475493. The next prime is 65475581. The reversal of 65475521 is 12557456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65475521 - 2¹⁴ = 65459137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65475581) 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, 9065 + ... + 14598.

It is an arithmetic number, because the mean of its divisors is an integer number (16375488).

Almost surely, 2^65475521 is an apocalyptic number.

It is an amenable number.

65475521 is a deficient number, since it is larger than the sum of its proper divisors (26431).

65475521 is a wasteful number, since it uses less digits than its factorization.

65475521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26430.

The product of its digits is 42000, while the sum is 35.

The square root of 65475521 is about 8091.6945691246. The cubic root of 65475521 is about 403.0506763686.

The spelling of 65475521 in words is "sixty-five million, four hundred seventy-five thousand, five hundred twenty-one".