55430172 has 108 divisors (see below), whose sum is σ = 165874800. Its totient is φ = 15600816.

The previous prime is 55430159. The next prime is 55430203. The reversal of 55430172 is 27103455.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

55430172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 827283 + ... + 827349.

Almost surely, 2^55430172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55430172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82937400).

55430172 is an abundant number, since it is smaller than the sum of its proper divisors (110444628).

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

55430172 is a wasteful number, since it uses less digits than its factorization.

55430172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 55430172 is about 7445.1441893358. The cubic root of 55430172 is about 381.2841412765.

The spelling of 55430172 in words is "fifty-five million, four hundred thirty thousand, one hundred seventy-two".