281360213 has 2 divisors, whose sum is σ = 281360214. Its totient is φ = 281360212.

The previous prime is 281360201. The next prime is 281360221. The reversal of 281360213 is 312063182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279491524 + 1868689 = 16718^2 + 1367^2 .

It is a cyclic number.

It is not a de Polignac number, because 281360213 - 2²⁰ = 280311637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281360713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140680106 + 140680107.

It is an arithmetic number, because the mean of its divisors is an integer number (140680107).

Almost surely, 2^281360213 is an apocalyptic number.

It is an amenable number.

281360213 is a deficient number, since it is larger than the sum of its proper divisors (1).

281360213 is an equidigital number, since it uses as much as digits as its factorization.

281360213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 281360213 is about 16773.7954261998. The cubic root of 281360213 is about 655.2709195301.

The spelling of 281360213 in words is "two hundred eighty-one million, three hundred sixty thousand, two hundred thirteen".