36516981 has 4 divisors (see below), whose sum is σ = 48689312. Its totient is φ = 24344652.

The previous prime is 36516941. The next prime is 36517051. The reversal of 36516981 is 18961563.

36516981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 36516981 - 2¹⁰ = 36515957 is a prime.

It is a super-2 number, since 2×36516981² = 2666979802708722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36516941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6086161 + ... + 6086166.

It is an arithmetic number, because the mean of its divisors is an integer number (12172328).

Almost surely, 2^36516981 is an apocalyptic number.

It is an amenable number.

36516981 is a deficient number, since it is larger than the sum of its proper divisors (12172331).

36516981 is a wasteful number, since it uses less digits than its factorization.

36516981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12172330.

The product of its digits is 38880, while the sum is 39.

The square root of 36516981 is about 6042.9281809401. The cubic root of 36516981 is about 331.7658053452.

The spelling of 36516981 in words is "thirty-six million, five hundred sixteen thousand, nine hundred eighty-one".