36531865 has 4 divisors (see below), whose sum is σ = 43838244. Its totient is φ = 29225488.

The previous prime is 36531829. The next prime is 36531881. The reversal of 36531865 is 56813563.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24890121 + 11641744 = 4989^2 + 3412^2 .

It is a cyclic number.

It is not a de Polignac number, because 36531865 - 2¹⁵ = 36499097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3653182 + ... + 3653191.

It is an arithmetic number, because the mean of its divisors is an integer number (10959561).

Almost surely, 2^36531865 is an apocalyptic number.

It is an amenable number.

36531865 is a deficient number, since it is larger than the sum of its proper divisors (7306379).

36531865 is an equidigital number, since it uses as much as digits as its factorization.

36531865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7306378.

The product of its digits is 64800, while the sum is 37.

The square root of 36531865 is about 6044.1595776419. The cubic root of 36531865 is about 331.8108741631.

The spelling of 36531865 in words is "thirty-six million, five hundred thirty-one thousand, eight hundred sixty-five".