56684281 has 4 divisors (see below), whose sum is σ = 57460852. Its totient is φ = 55907712.

The previous prime is 56684267. The next prime is 56684321. The reversal of 56684281 is 18248665.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37015056 + 19669225 = 6084^2 + 4435^2 .

It is a cyclic number.

It is not a de Polignac number, because 56684281 - 2⁵ = 56684249 is a prime.

It is a super-2 number, since 2×56684281² = 6426215424973922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56684261) 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, 388176 + ... + 388321.

It is an arithmetic number, because the mean of its divisors is an integer number (14365213).

Almost surely, 2^56684281 is an apocalyptic number.

It is an amenable number.

56684281 is a deficient number, since it is larger than the sum of its proper divisors (776571).

56684281 is an equidigital number, since it uses as much as digits as its factorization.

56684281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776570.

The product of its digits is 92160, while the sum is 40.

The square root of 56684281 is about 7528.8963998716. The cubic root of 56684281 is about 384.1382445856.

It can be divided in two parts, 56684 and 281, that added together give a palindrome (56965).

The spelling of 56684281 in words is "fifty-six million, six hundred eighty-four thousand, two hundred eighty-one".