281311343 has 2 divisors, whose sum is σ = 281311344. Its totient is φ = 281311342.

The previous prime is 281311313. The next prime is 281311357. The reversal of 281311343 is 343113182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 281311343 - 2²⁰ = 280262767 is a prime.

It is a super-4 number, since 4×281311343⁴ (a number of 35 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281311313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140655671 + 140655672.

It is an arithmetic number, because the mean of its divisors is an integer number (140655672).

Almost surely, 2^281311343 is an apocalyptic number.

281311343 is a deficient number, since it is larger than the sum of its proper divisors (1).

281311343 is an equidigital number, since it uses as much as digits as its factorization.

281311343 is an evil number, because the sum of its binary digits is even.

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

The square root of 281311343 is about 16772.3386264409. The cubic root of 281311343 is about 655.2329789086.

The spelling of 281311343 in words is "two hundred eighty-one million, three hundred eleven thousand, three hundred forty-three".