280343431 has 2 divisors, whose sum is σ = 280343432. Its totient is φ = 280343430.

The previous prime is 280343417. The next prime is 280343449. The reversal of 280343431 is 134343082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 280343431 - 2⁹ = 280342919 is a prime.

It is a super-2 number, since 2×280343431² = 157184878609703522, 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 280343431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280343131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140171715 + 140171716.

It is an arithmetic number, because the mean of its divisors is an integer number (140171716).

Almost surely, 2^280343431 is an apocalyptic number.

280343431 is a deficient number, since it is larger than the sum of its proper divisors (1).

280343431 is an equidigital number, since it uses as much as digits as its factorization.

280343431 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 28.

The square root of 280343431 is about 16743.4593498476. The cubic root of 280343431 is about 654.4806255126.

The spelling of 280343431 in words is "two hundred eighty million, three hundred forty-three thousand, four hundred thirty-one".