281320307 has 2 divisors, whose sum is σ = 281320308. Its totient is φ = 281320306.

The previous prime is 281320297. The next prime is 281320309. The reversal of 281320307 is 703023182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 281320307 - 2⁶ = 281320243 is a prime.

It is a super-2 number, since 2×281320307² = 158282230261148498, which contains 22 as substring.

Together with 281320309, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (281320309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140660153 + 140660154.

It is an arithmetic number, because the mean of its divisors is an integer number (140660154).

Almost surely, 2^281320307 is an apocalyptic number.

281320307 is a deficient number, since it is larger than the sum of its proper divisors (1).

281320307 is an equidigital number, since it uses as much as digits as its factorization.

281320307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 281320307 is about 16772.6058500163. The cubic root of 281320307 is about 655.2399385119.

Adding to 281320307 its reverse (703023182), we get a palindrome (984343489).

The spelling of 281320307 in words is "two hundred eighty-one million, three hundred twenty thousand, three hundred seven".