56049281 has 4 divisors (see below), whose sum is σ = 56086272. Its totient is φ = 56012292.

The previous prime is 56049277. The next prime is 56049283. The reversal of 56049281 is 18294065.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18294065 = 5 ⋅3658813.

It is a cyclic number.

It is not a de Polignac number, because 56049281 - 2² = 56049277 is a prime.

It is a super-2 number, since 2×56049281² = 6283043801233922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56049283) 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, 16121 + ... + 19286.

It is an arithmetic number, because the mean of its divisors is an integer number (14021568).

Almost surely, 2^56049281 is an apocalyptic number.

It is an amenable number.

56049281 is a deficient number, since it is larger than the sum of its proper divisors (36991).

56049281 is a wasteful number, since it uses less digits than its factorization.

56049281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36990.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 56049281 is about 7486.6067747679. The cubic root of 56049281 is about 382.6984312232.

The spelling of 56049281 in words is "fifty-six million, forty-nine thousand, two hundred eighty-one".