281224039 has 2 divisors, whose sum is σ = 281224040. Its totient is φ = 281224038.

The previous prime is 281223977. The next prime is 281224051. The reversal of 281224039 is 930422182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 281224039 - 2¹⁷ = 281092967 is a prime.

It is a super-2 number, since 2×281224039² = 158173920222947042, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 281224039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281224079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140612019 + 140612020.

It is an arithmetic number, because the mean of its divisors is an integer number (140612020).

Almost surely, 2^281224039 is an apocalyptic number.

281224039 is a deficient number, since it is larger than the sum of its proper divisors (1).

281224039 is an equidigital number, since it uses as much as digits as its factorization.

281224039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 281224039 is about 16769.7358059094. The cubic root of 281224039 is about 655.1651888009.

The spelling of 281224039 in words is "two hundred eighty-one million, two hundred twenty-four thousand, thirty-nine".