55147180 has 48 divisors (see below), whose sum is σ = 126846720. Its totient is φ = 19972800.

The previous prime is 55147129. The next prime is 55147207. The reversal of 55147180 is 8174155.

It is a super-2 number, since 2×55147180² = 6082422923904800, which contains 22 as substring.

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, 96295 + ... + 96865.

It is an arithmetic number, because the mean of its divisors is an integer number (2642640).

Almost surely, 2^55147180 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 55147180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63423360).

55147180 is an abundant number, since it is smaller than the sum of its proper divisors (71699540).

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

55147180 is a wasteful number, since it uses less digits than its factorization.

55147180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030 (or 1028 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 55147180 is about 7426.1147311363. The cubic root of 55147180 is about 380.6341672974.

The spelling of 55147180 in words is "fifty-five million, one hundred forty-seven thousand, one hundred eighty".