280221509479 has 2 divisors, whose sum is σ = 280221509480. Its totient is φ = 280221509478.

The previous prime is 280221509473. The next prime is 280221509489. The reversal of 280221509479 is 974905122082.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280221509479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280221509473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140110754739 + 140110754740.

It is an arithmetic number, because the mean of its divisors is an integer number (140110754740).

Almost surely, 2^280221509479 is an apocalyptic number.

280221509479 is a deficient number, since it is larger than the sum of its proper divisors (1).

280221509479 is an equidigital number, since it uses as much as digits as its factorization.

280221509479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 280221509479 in words is "two hundred eighty billion, two hundred twenty-one million, five hundred nine thousand, four hundred seventy-nine".