56201181 has 4 divisors (see below), whose sum is σ = 74934912. Its totient is φ = 37467452.

The previous prime is 56201137. The next prime is 56201239. The reversal of 56201181 is 18110265.

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 56201181 - 2⁷ = 56201053 is a prime.

It is a super-2 number, since 2×56201181² = 6317145491589522, 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 (56201111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9366861 + ... + 9366866.

It is an arithmetic number, because the mean of its divisors is an integer number (18733728).

Almost surely, 2^56201181 is an apocalyptic number.

It is an amenable number.

56201181 is a deficient number, since it is larger than the sum of its proper divisors (18733731).

56201181 is a wasteful number, since it uses less digits than its factorization.

56201181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18733730.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 56201181 is about 7496.7446935320. The cubic root of 56201181 is about 383.0438383059.

The spelling of 56201181 in words is "fifty-six million, two hundred one thousand, one hundred eighty-one".