55831771 has 4 divisors (see below), whose sum is σ = 56154672. Its totient is φ = 55508872.

The previous prime is 55831753. The next prime is 55831793. The reversal of 55831771 is 17713855.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17713855 = 5 ⋅3542771.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55831771 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55831771.

It is not an unprimeable number, because it can be changed into a prime (55831751) 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, 161191 + ... + 161536.

It is an arithmetic number, because the mean of its divisors is an integer number (14038668).

Almost surely, 2^55831771 is an apocalyptic number.

55831771 is a deficient number, since it is larger than the sum of its proper divisors (322901).

55831771 is a wasteful number, since it uses less digits than its factorization.

55831771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322900.

The product of its digits is 29400, while the sum is 37.

The square root of 55831771 is about 7472.0660462820. The cubic root of 55831771 is about 382.2027445450.

The spelling of 55831771 in words is "fifty-five million, eight hundred thirty-one thousand, seven hundred seventy-one".