55731871 has 4 divisors (see below), whose sum is σ = 60018952. Its totient is φ = 51444792.

The previous prime is 55731869. The next prime is 55731887. The reversal of 55731871 is 17813755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17813755 = 5 ⋅3562751.

It is a cyclic number.

It is not a de Polignac number, because 55731871 - 2¹ = 55731869 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 55731871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55731371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2143521 + ... + 2143546.

It is an arithmetic number, because the mean of its divisors is an integer number (15004738).

Almost surely, 2^55731871 is an apocalyptic number.

55731871 is a deficient number, since it is larger than the sum of its proper divisors (4287081).

55731871 is a wasteful number, since it uses less digits than its factorization.

55731871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4287080.

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

The square root of 55731871 is about 7465.3781551908. The cubic root of 55731871 is about 381.9746495060.

The spelling of 55731871 in words is "fifty-five million, seven hundred thirty-one thousand, eight hundred seventy-one".