55728171 has 12 divisors (see below), whose sum is σ = 80915848. Its totient is φ = 36958464.

The previous prime is 55728163. The next prime is 55728181. The reversal of 55728171 is 17182755.

55728171 is a `hidden beast` number, since 5 + 572 + 81 + 7 + 1 = 666.

It is not a de Polignac number, because 55728171 - 2³ = 55728163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55728131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14305 + ... + 17778.

Almost surely, 2^55728171 is an apocalyptic number.

55728171 is a deficient number, since it is larger than the sum of its proper divisors (25187677).

55728171 is a wasteful number, since it uses less digits than its factorization.

55728171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32282 (or 32279 counting only the distinct ones).

The product of its digits is 19600, while the sum is 36.

The square root of 55728171 is about 7465.1303404562. The cubic root of 55728171 is about 381.9661963088.

The spelling of 55728171 in words is "fifty-five million, seven hundred twenty-eight thousand, one hundred seventy-one".