280955513 has 2 divisors, whose sum is σ = 280955514. Its totient is φ = 280955512.

The previous prime is 280955503. The next prime is 280955531. The reversal of 280955513 is 315559082.

Together with next prime (280955531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181494784 + 99460729 = 13472^2 + 9973^2 .

It is a cyclic number.

It is not a de Polignac number, because 280955513 - 2⁴ = 280955497 is a prime.

It is not a weakly prime, because it can be changed into another prime (280955503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140477756 + 140477757.

It is an arithmetic number, because the mean of its divisors is an integer number (140477757).

Almost surely, 2^280955513 is an apocalyptic number.

It is an amenable number.

280955513 is a deficient number, since it is larger than the sum of its proper divisors (1).

280955513 is an equidigital number, since it uses as much as digits as its factorization.

280955513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 38.

The square root of 280955513 is about 16761.7276257550. The cubic root of 280955513 is about 654.9565948356.

The spelling of 280955513 in words is "two hundred eighty million, nine hundred fifty-five thousand, five hundred thirteen".