55171281 has 32 divisors (see below), whose sum is σ = 83131776. Its totient is φ = 32524800.

The previous prime is 55171247. The next prime is 55171301. The reversal of 55171281 is 18217155.

55171281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-55171281 is a prime.

It is a super-2 number, since 2×55171281² = 6087740494361922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55171211) 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 31 ways as a sum of consecutive naturals, for example, 163545 + ... + 163881.

It is an arithmetic number, because the mean of its divisors is an integer number (2597868).

Almost surely, 2^55171281 is an apocalyptic number.

It is an amenable number.

55171281 is a deficient number, since it is larger than the sum of its proper divisors (27960495).

55171281 is a wasteful number, since it uses less digits than its factorization.

55171281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 392 counting only the distinct ones).

The product of its digits is 2800, while the sum is 30.

The square root of 55171281 is about 7427.7372732212. The cubic root of 55171281 is about 380.6896088026.

The spelling of 55171281 in words is "fifty-five million, one hundred seventy-one thousand, two hundred eighty-one".