281280451 has 2 divisors, whose sum is σ = 281280452. Its totient is φ = 281280450.

The previous prime is 281280431. The next prime is 281280457. The reversal of 281280451 is 154082182.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281280451 is a prime.

It is a super-2 number, since 2×281280451² = 158237384229526802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (281280457) 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, 140640225 + 140640226.

It is an arithmetic number, because the mean of its divisors is an integer number (140640226).

Almost surely, 2^281280451 is an apocalyptic number.

281280451 is a deficient number, since it is larger than the sum of its proper divisors (1).

281280451 is an equidigital number, since it uses as much as digits as its factorization.

281280451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 281280451 is about 16771.4176800889. The cubic root of 281280451 is about 655.2089933867.

The spelling of 281280451 in words is "two hundred eighty-one million, two hundred eighty thousand, four hundred fifty-one".