55157 has 4 divisors (see below), whose sum is σ = 58080. Its totient is φ = 52236.

The previous prime is 55147. The next prime is 55163. The reversal of 55157 is 75155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75155 = 5 ⋅15031.

It is a cyclic number.

It is not a de Polignac number, because 55157 - 2¹⁰ = 54133 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55117) 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, 1433 + ... + 1470.

It is an arithmetic number, because the mean of its divisors is an integer number (14520).

2⁵⁵¹⁵⁷ is an apocalyptic number.

It is an amenable number.

55157 is a deficient number, since it is larger than the sum of its proper divisors (2923).

55157 is a wasteful number, since it uses less digits than its factorization.

55157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2922.

The product of its digits is 875, while the sum is 23.

The square root of 55157 is about 234.8552745842. The cubic root of 55157 is about 38.0656758998.

It can be divided in two parts, 55 and 157, that added together give a palindrome (212).

The spelling of 55157 in words is "fifty-five thousand, one hundred fifty-seven".