280221509473 has 2 divisors, whose sum is σ = 280221509474. Its totient is φ = 280221509472.

The previous prime is 280221509441. The next prime is 280221509479. The reversal of 280221509473 is 374905122082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160859551329 + 119361958144 = 401073^2 + 345488^2 .

It is a cyclic number.

It is not a de Polignac number, because 280221509473 - 2⁵ = 280221509441 is a prime.

It is not a weakly prime, because it can be changed into another prime (280221509479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140110754736 + 140110754737.

It is an arithmetic number, because the mean of its divisors is an integer number (140110754737).

Almost surely, 2^280221509473 is an apocalyptic number.

It is an amenable number.

280221509473 is a deficient number, since it is larger than the sum of its proper divisors (1).

280221509473 is an equidigital number, since it uses as much as digits as its factorization.

280221509473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 280221509473 in words is "two hundred eighty billion, two hundred twenty-one million, five hundred nine thousand, four hundred seventy-three".