280221509441 has 2 divisors, whose sum is σ = 280221509442. Its totient is φ = 280221509440.

The previous prime is 280221509429. The next prime is 280221509473. The reversal of 280221509441 is 144905122082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175229308816 + 104992200625 = 418604^2 + 324025^2 .

It is a cyclic number.

It is not a de Polignac number, because 280221509441 - 2¹⁸ = 280221247297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 280221509395 and 280221509404.

It is not a weakly prime, because it can be changed into another prime (280221509411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140110754720 + 140110754721.

It is an arithmetic number, because the mean of its divisors is an integer number (140110754721).

Almost surely, 2^280221509441 is an apocalyptic number.

It is an amenable number.

280221509441 is a deficient number, since it is larger than the sum of its proper divisors (1).

280221509441 is an equidigital number, since it uses as much as digits as its factorization.

280221509441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 280221509441 in words is "two hundred eighty billion, two hundred twenty-one million, five hundred nine thousand, four hundred forty-one".