55349980 has 48 divisors (see below), whose sum is σ = 137430720. Its totient is φ = 18321408.

The previous prime is 55349971. The next prime is 55349993. The reversal of 55349980 is 8994355.

It is a happy number.

55349980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

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 15 ways as a sum of consecutive naturals, for example, 2757 + ... + 10876.

It is an arithmetic number, because the mean of its divisors is an integer number (2863140).

Almost surely, 2^55349980 is an apocalyptic number.

It is an amenable number.

55349980 is an abundant number, since it is smaller than the sum of its proper divisors (82080740).

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

55349980 is a wasteful number, since it uses less digits than its factorization.

55349980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13678 (or 13676 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 55349980 is about 7439.7567164525. The cubic root of 55349980 is about 381.1001819299.

The spelling of 55349980 in words is "fifty-five million, three hundred forty-nine thousand, nine hundred eighty".