280555243 has 2 divisors, whose sum is σ = 280555244. Its totient is φ = 280555242.

The previous prime is 280555241. The next prime is 280555271. The reversal of 280555243 is 342555082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 280555243 - 2¹ = 280555241 is a prime.

It is a super-2 number, since 2×280555243² = 157422488749578098, which contains 22 as substring.

Together with 280555241, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 280555199 and 280555208.

It is not a weakly prime, because it can be changed into another prime (280555241) 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, 140277621 + 140277622.

It is an arithmetic number, because the mean of its divisors is an integer number (140277622).

Almost surely, 2^280555243 is an apocalyptic number.

280555243 is a deficient number, since it is larger than the sum of its proper divisors (1).

280555243 is an equidigital number, since it uses as much as digits as its factorization.

280555243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48000, while the sum is 34.

The square root of 280555243 is about 16749.7833717335. The cubic root of 280555243 is about 654.6454138123.

The spelling of 280555243 in words is "two hundred eighty million, five hundred fifty-five thousand, two hundred forty-three".