281435381 has 2 divisors, whose sum is σ = 281435382. Its totient is φ = 281435380.

The previous prime is 281435351. The next prime is 281435411. The reversal of 281435381 is 183534182.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (281435351) and next prime (281435411).

It can be written as a sum of positive squares in only one way, i.e., 269255281 + 12180100 = 16409^2 + 3490^2 .

It is a cyclic number.

It is not a de Polignac number, because 281435381 - 2¹⁴ = 281418997 is a prime.

It is a super-2 number, since 2×281435381² = 158411747357230322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281435351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140717690 + 140717691.

It is an arithmetic number, because the mean of its divisors is an integer number (140717691).

Almost surely, 2^281435381 is an apocalyptic number.

It is an amenable number.

281435381 is a deficient number, since it is larger than the sum of its proper divisors (1).

281435381 is an equidigital number, since it uses as much as digits as its factorization.

281435381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 35.

The square root of 281435381 is about 16776.0359143631. The cubic root of 281435381 is about 655.3292682429.

The spelling of 281435381 in words is "two hundred eighty-one million, four hundred thirty-five thousand, three hundred eighty-one".