280050055 has 4 divisors (see below), whose sum is σ = 336060072. Its totient is φ = 224040040.

The previous prime is 280050053. The next prime is 280050083. The reversal of 280050055 is 550050082.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 280050055 - 2¹ = 280050053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280050053) 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 3 ways as a sum of consecutive naturals, for example, 28005001 + ... + 28005010.

It is an arithmetic number, because the mean of its divisors is an integer number (84015018).

Almost surely, 2^280050055 is an apocalyptic number.

280050055 is a deficient number, since it is larger than the sum of its proper divisors (56010017).

280050055 is an equidigital number, since it uses as much as digits as its factorization.

280050055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56010016.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 280050055 is about 16734.6961430436. The cubic root of 280050055 is about 654.2522438159.

The spelling of 280050055 in words is "two hundred eighty million, fifty thousand, fifty-five".