55791 has 6 divisors (see below), whose sum is σ = 80600. Its totient is φ = 37188.

The previous prime is 55787. The next prime is 55793. The reversal of 55791 is 19755.

It is not a de Polignac number, because 55791 - 2² = 55787 is a prime.

It is a super-2 number, since 2×55791² = 6225271362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55793) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3091 + ... + 3108.

2⁵⁵⁷⁹¹ is an apocalyptic number.

55791 is a deficient number, since it is larger than the sum of its proper divisors (24809).

55791 is a wasteful number, since it uses less digits than its factorization.

55791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6205 (or 6202 counting only the distinct ones).

The product of its digits is 1575, while the sum is 27.

The square root of 55791 is about 236.2011854331. The cubic root of 55791 is about 38.2109687716.

The spelling of 55791 in words is "fifty-five thousand, seven hundred ninety-one".