56272181 has 4 divisors (see below), whose sum is σ = 64311072. Its totient is φ = 48233292.

The previous prime is 56272157. The next prime is 56272187. The reversal of 56272181 is 18127265.

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 56272181 - 2¹⁰ = 56271157 is a prime.

It is a super-2 number, since 2×56272181² = 6333116708993522, 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 (56272187) 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, 4019435 + ... + 4019448.

It is an arithmetic number, because the mean of its divisors is an integer number (16077768).

Almost surely, 2^56272181 is an apocalyptic number.

It is an amenable number.

56272181 is a deficient number, since it is larger than the sum of its proper divisors (8038891).

56272181 is an equidigital number, since it uses as much as digits as its factorization.

56272181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8038890.

The product of its digits is 6720, while the sum is 32.

The square root of 56272181 is about 7501.4785875853. The cubic root of 56272181 is about 383.2050725695.

The spelling of 56272181 in words is "fifty-six million, two hundred seventy-two thousand, one hundred eighty-one".