55273281 has 8 divisors (see below), whose sum is σ = 84225984. Its totient is φ = 31584720.

The previous prime is 55273249. The next prime is 55273297. The reversal of 55273281 is 18237255.

55273281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55273281 - 2⁵ = 55273249 is a prime.

It is a super-2 number, since 2×55273281² = 6110271185009922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55273241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1316010 + ... + 1316051.

It is an arithmetic number, because the mean of its divisors is an integer number (10528248).

Almost surely, 2^55273281 is an apocalyptic number.

It is an amenable number.

55273281 is a deficient number, since it is larger than the sum of its proper divisors (28952703).

55273281 is a wasteful number, since it uses less digits than its factorization.

55273281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632071.

The product of its digits is 16800, while the sum is 33.

The square root of 55273281 is about 7434.6002582520. The cubic root of 55273281 is about 380.9240691611.

The spelling of 55273281 in words is "fifty-five million, two hundred seventy-three thousand, two hundred eighty-one".