36538581 has 8 divisors (see below), whose sum is σ = 48746880. Its totient is φ = 24344672.

The previous prime is 36538561. The next prime is 36538597. The reversal of 36538581 is 18583563.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 36538581 - 2⁹ = 36538069 is a prime.

It is a super-2 number, since 2×36538581² = 2670135802987122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36538561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5956 + ... + 10418.

It is an arithmetic number, because the mean of its divisors is an integer number (6093360).

Almost surely, 2^36538581 is an apocalyptic number.

It is an amenable number.

36538581 is a deficient number, since it is larger than the sum of its proper divisors (12208299).

36538581 is a wasteful number, since it uses less digits than its factorization.

36538581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7195.

The product of its digits is 86400, while the sum is 39.

The square root of 36538581 is about 6044.7151297642. The cubic root of 36538581 is about 331.8312062329.

The spelling of 36538581 in words is "thirty-six million, five hundred thirty-eight thousand, five hundred eighty-one".