55057571 has 4 divisors (see below), whose sum is σ = 55074600. Its totient is φ = 55040544.

The previous prime is 55057567. The next prime is 55057609. The reversal of 55057571 is 17575055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17575055 = 5 ⋅3515011.

It is a cyclic number.

It is not a de Polignac number, because 55057571 - 2² = 55057567 is a prime.

It is a super-2 number, since 2×55057571² = 6062672248840082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55057531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2006 + ... + 10683.

It is an arithmetic number, because the mean of its divisors is an integer number (13768650).

Almost surely, 2^55057571 is an apocalyptic number.

55057571 is a deficient number, since it is larger than the sum of its proper divisors (17029).

55057571 is a wasteful number, since it uses less digits than its factorization.

55057571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17028.

The product of its (nonzero) digits is 30625, while the sum is 35.

The square root of 55057571 is about 7420.0789079362. The cubic root of 55057571 is about 380.4278905786.

The spelling of 55057571 in words is "fifty-five million, fifty-seven thousand, five hundred seventy-one".