280555241 has 2 divisors, whose sum is σ = 280555242. Its totient is φ = 280555240.

The previous prime is 280555181. The next prime is 280555243. The reversal of 280555241 is 142555082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159643225 + 120912016 = 12635^2 + 10996^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280555241 is a prime.

It is a super-2 number, since 2×280555241² = 157422486505136162, which contains 22 as substring.

Together with 280555243, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 280555198 and 280555207.

It is not a weakly prime, because it can be changed into another prime (280555243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140277620 + 140277621.

It is an arithmetic number, because the mean of its divisors is an integer number (140277621).

Almost surely, 2^280555241 is an apocalyptic number.

It is an amenable number.

280555241 is a deficient number, since it is larger than the sum of its proper divisors (1).

280555241 is an equidigital number, since it uses as much as digits as its factorization.

280555241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 280555241 is about 16749.7833120312. The cubic root of 280555241 is about 654.6454122567.

The spelling of 280555241 in words is "two hundred eighty million, five hundred fifty-five thousand, two hundred forty-one".