36220581 has 16 divisors (see below), whose sum is σ = 53870400. Its totient is φ = 24052464.

The previous prime is 36220567. The next prime is 36220603. The reversal of 36220581 is 18502263.

36220581 is a `hidden beast` number, since 3 + 62 + 20 + 581 = 666.

It is not a de Polignac number, because 36220581 - 2⁹ = 36220069 is a prime.

It is a super-2 number, since 2×36220581² = 2623860975955122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36220501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4770 + ... + 9756.

It is an arithmetic number, because the mean of its divisors is an integer number (3366900).

Almost surely, 2^36220581 is an apocalyptic number.

It is an amenable number.

36220581 is a deficient number, since it is larger than the sum of its proper divisors (17649819).

36220581 is a wasteful number, since it uses less digits than its factorization.

36220581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5265 (or 5259 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 36220581 is about 6018.3536785403. The cubic root of 36220581 is about 330.8657432959.

The spelling of 36220581 in words is "thirty-six million, two hundred twenty thousand, five hundred eighty-one".