36564521 has 4 divisors (see below), whose sum is σ = 41788032. Its totient is φ = 31341012.

The previous prime is 36564487. The next prime is 36564523. The reversal of 36564521 is 12546563.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12546563 = 773 ⋅16231.

It is a cyclic number.

It is not a de Polignac number, because 36564521 - 2¹⁰ = 36563497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36564523) 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, 2611745 + ... + 2611758.

It is an arithmetic number, because the mean of its divisors is an integer number (10447008).

Almost surely, 2^36564521 is an apocalyptic number.

It is an amenable number.

36564521 is a deficient number, since it is larger than the sum of its proper divisors (5223511).

36564521 is an equidigital number, since it uses as much as digits as its factorization.

36564521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5223510.

The product of its digits is 21600, while the sum is 32.

The square root of 36564521 is about 6046.8604250470. The cubic root of 36564521 is about 331.9097138002.

The spelling of 36564521 in words is "thirty-six million, five hundred sixty-four thousand, five hundred twenty-one".