83831281 has 4 divisors (see below), whose sum is σ = 83920752. Its totient is φ = 83741812.

The previous prime is 83831269. The next prime is 83831291. The reversal of 83831281 is 18213838.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83831281 - 2¹⁷ = 83700209 is a prime.

It is a super-2 number, since 2×83831281² = 14055367348201922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83831291) 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 in 3 ways as a sum of consecutive naturals, for example, 43315 + ... + 45208.

It is an arithmetic number, because the mean of its divisors is an integer number (20980188).

Almost surely, 2^83831281 is an apocalyptic number.

It is an amenable number.

83831281 is a deficient number, since it is larger than the sum of its proper divisors (89471).

83831281 is an equidigital number, since it uses as much as digits as its factorization.

83831281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89470.

The product of its digits is 9216, while the sum is 34.

The square root of 83831281 is about 9155.9423873242. The cubic root of 83831281 is about 437.6584999586.

The spelling of 83831281 in words is "eighty-three million, eight hundred thirty-one thousand, two hundred eighty-one".