55031 has 4 divisors (see below), whose sum is σ = 55632. Its totient is φ = 54432.

The previous prime is 55021. The next prime is 55049. The reversal of 55031 is 13055.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55031 is a prime.

It is a super-2 number, since 2×55031² = 6056821922, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 54997 and 55015.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 55031.

It is not an unprimeable number, because it can be changed into a prime (55001) 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, 131 + ... + 356.

It is an arithmetic number, because the mean of its divisors is an integer number (13908).

2⁵⁵⁰³¹ is an apocalyptic number.

55031 is a deficient number, since it is larger than the sum of its proper divisors (601).

55031 is a wasteful number, since it uses less digits than its factorization.

55031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600.

The product of its (nonzero) digits is 75, while the sum is 14.

The square root of 55031 is about 234.5868709029. The cubic root of 55031 is about 38.0366682066.

Adding to 55031 its reverse (13055), we get a palindrome (68086).

The spelling of 55031 in words is "fifty-five thousand, thirty-one".