55832281 has 4 divisors (see below), whose sum is σ = 56459700. Its totient is φ = 55204864.

The previous prime is 55832243. The next prime is 55832291. The reversal of 55832281 is 18223855.

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 24651225 + 31181056 = 4965^2 + 5584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55832281 is a prime.

It is a super-2 number, since 2×55832281² = 6234487203325922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55832291) 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, 313576 + ... + 313753.

It is an arithmetic number, because the mean of its divisors is an integer number (14114925).

Almost surely, 2^55832281 is an apocalyptic number.

It is an amenable number.

55832281 is a deficient number, since it is larger than the sum of its proper divisors (627419).

55832281 is an equidigital number, since it uses as much as digits as its factorization.

55832281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627418.

The product of its digits is 19200, while the sum is 34.

The square root of 55832281 is about 7472.1001733114. The cubic root of 55832281 is about 382.2039082958.

The spelling of 55832281 in words is "fifty-five million, eight hundred thirty-two thousand, two hundred eighty-one".