55045172 has 48 divisors (see below), whose sum is σ = 119857920. Its totient is φ = 21537792.

The previous prime is 55045153. The next prime is 55045183. The reversal of 55045172 is 27154055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34529 + ... + 36087.

It is an arithmetic number, because the mean of its divisors is an integer number (2497040).

Almost surely, 2^55045172 is an apocalyptic number.

55045172 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55045172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59928960).

55045172 is an abundant number, since it is smaller than the sum of its proper divisors (64812748).

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

55045172 is a wasteful number, since it uses less digits than its factorization.

55045172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680 (or 1678 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 55045172 is about 7419.2433576477. The cubic root of 55045172 is about 380.3993309003.

The spelling of 55045172 in words is "fifty-five million, forty-five thousand, one hundred seventy-two".