36822581 has 4 divisors (see below), whose sum is σ = 36848832. Its totient is φ = 36796332.

The previous prime is 36822559. The next prime is 36822601. The reversal of 36822581 is 18522863.

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 36822581 - 2¹⁰ = 36821557 is a prime.

It is a super-2 number, since 2×36822581² = 2711804943003122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36822481) 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, 10895 + ... + 13868.

It is an arithmetic number, because the mean of its divisors is an integer number (9212208).

Almost surely, 2^36822581 is an apocalyptic number.

It is an amenable number.

36822581 is a deficient number, since it is larger than the sum of its proper divisors (26251).

36822581 is a wasteful number, since it uses less digits than its factorization.

36822581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26250.

The product of its digits is 23040, while the sum is 35.

The square root of 36822581 is about 6068.1612536254. The cubic root of 36822581 is about 332.6887194446.

The spelling of 36822581 in words is "thirty-six million, eight hundred twenty-two thousand, five hundred eighty-one".