55422 has 12 divisors (see below), whose sum is σ = 120120. Its totient is φ = 18468.

The previous prime is 55411. The next prime is 55439. The reversal of 55422 is 22455.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 3079 = 55422 / (5 + 5 + 4 + 2 + 2).

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 55395 and 55404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1522 + ... + 1557.

It is an arithmetic number, because the mean of its divisors is an integer number (10010).

2⁵⁵⁴²² is an apocalyptic number.

55422 is an abundant number, since it is smaller than the sum of its proper divisors (64698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55422 is a wasteful number, since it uses less digits than its factorization.

55422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3087 (or 3084 counting only the distinct ones).

The product of its digits is 400, while the sum is 18.

The square root of 55422 is about 235.4187758018. The cubic root of 55422 is about 38.1265402943.

Adding to 55422 its reverse (22455), we get a palindrome (77877).

It can be divided in two parts, 554 and 22, that added together give a square (576 = 24²).

The spelling of 55422 in words is "fifty-five thousand, four hundred twenty-two".