55280550 has 48 divisors (see below), whose sum is σ = 147646800. Its totient is φ = 13607040.

The previous prime is 55280543. The next prime is 55280551. The reversal of 55280550 is 5508255.

55280550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (55280551) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 12225 + ... + 16124.

It is an arithmetic number, because the mean of its divisors is an integer number (3075975).

Almost surely, 2^55280550 is an apocalyptic number.

55280550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55280550 is an abundant number, since it is smaller than the sum of its proper divisors (92366250).

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

55280550 is a wasteful number, since it uses less digits than its factorization.

55280550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28377 (or 28372 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

The square root of 55280550 is about 7435.0891050478. The cubic root of 55280550 is about 380.9407668954.

The spelling of 55280550 in words is "fifty-five million, two hundred eighty thousand, five hundred fifty".