55030280 has 16 divisors (see below), whose sum is σ = 123818220. Its totient is φ = 22012096.

The previous prime is 55030259. The next prime is 55030291. The reversal of 55030280 is 8203055.

It can be written as a sum of positive squares in 2 ways, for example, as 51351556 + 3678724 = 7166^2 + 1918^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 687839 + ... + 687918.

Almost surely, 2^55030280 is an apocalyptic number.

It is an amenable number.

55030280 is an abundant number, since it is smaller than the sum of its proper divisors (68787940).

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

55030280 is a wasteful number, since it uses less digits than its factorization.

55030280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375768 (or 1375764 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 55030280 is about 7418.2396833750. The cubic root of 55030280 is about 380.3650232122.

The spelling of 55030280 in words is "fifty-five million, thirty thousand, two hundred eighty".