56272281 has 16 divisors (see below), whose sum is σ = 85055040. Its totient is φ = 32806080.

The previous prime is 56272277. The next prime is 56272289. The reversal of 56272281 is 18227265.

It is not a de Polignac number, because 56272281 - 2² = 56272277 is a prime.

It is a super-2 number, since 2×56272281² = 6333139217885922, which contains 22 as substring.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (56272289) 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, 37230 + ... + 38711.

It is an arithmetic number, because the mean of its divisors is an integer number (5315940).

Almost surely, 2^56272281 is an apocalyptic number.

It is an amenable number.

56272281 is a deficient number, since it is larger than the sum of its proper divisors (28782759).

56272281 is a wasteful number, since it uses less digits than its factorization.

56272281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75976.

The product of its digits is 13440, while the sum is 33.

The square root of 56272281 is about 7501.4852529349. The cubic root of 56272281 is about 383.2052995644.

The spelling of 56272281 in words is "fifty-six million, two hundred seventy-two thousand, two hundred eighty-one".