55481380 has 24 divisors (see below), whose sum is σ = 116831232. Its totient is φ = 22131552.

The previous prime is 55481369. The next prime is 55481383. The reversal of 55481380 is 8318455.

It is not an unprimeable number, because it can be changed into a prime (55481383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4039 + ... + 11281.

It is an arithmetic number, because the mean of its divisors is an integer number (4867968).

Almost surely, 2^55481380 is an apocalyptic number.

It is an amenable number.

55481380 is an abundant number, since it is smaller than the sum of its proper divisors (61349852).

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

55481380 is a wasteful number, since it uses less digits than its factorization.

55481380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7635 (or 7633 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 55481380 is about 7448.5824154667. The cubic root of 55481380 is about 381.4015189198.

The spelling of 55481380 in words is "fifty-five million, four hundred eighty-one thousand, three hundred eighty".