36155581 has 12 divisors (see below), whose sum is σ = 45882720. Its totient is φ = 28172760.

The previous prime is 36155573. The next prime is 36155597. The reversal of 36155581 is 18555163.

It is not a de Polignac number, because 36155581 - 2³ = 36155573 is a prime.

It is a super-2 number, since 2×36155581² = 2614452074895122, 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 (36155501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33001 + ... + 34078.

It is an arithmetic number, because the mean of its divisors is an integer number (3823560).

Almost surely, 2^36155581 is an apocalyptic number.

It is an amenable number.

36155581 is a deficient number, since it is larger than the sum of its proper divisors (9727139).

36155581 is a wasteful number, since it uses less digits than its factorization.

36155581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67104 (or 67097 counting only the distinct ones).

The product of its digits is 18000, while the sum is 34.

The square root of 36155581 is about 6012.9511057383. The cubic root of 36155581 is about 330.6677053267.

The spelling of 36155581 in words is "thirty-six million, one hundred fifty-five thousand, five hundred eighty-one".