55308180 has 48 divisors (see below), whose sum is σ = 158647104. Its totient is φ = 14388480.

The previous prime is 55308179. The next prime is 55308181. The reversal of 55308180 is 8180355.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55308179) and next prime (55308181).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55308181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8782 + ... + 13701.

It is an arithmetic number, because the mean of its divisors is an integer number (3305148).

Almost surely, 2^55308180 is an apocalyptic number.

It is an amenable number.

55308180 is an abundant number, since it is smaller than the sum of its proper divisors (103338924).

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

55308180 is a wasteful number, since it uses less digits than its factorization.

55308180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22536 (or 22534 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 55308180 is about 7436.9469542279. The cubic root of 55308180 is about 381.0042228505.

The spelling of 55308180 in words is "fifty-five million, three hundred eight thousand, one hundred eighty".