83457281 has 8 divisors (see below), whose sum is σ = 85714464. Its totient is φ = 81214560.

The previous prime is 83457229. The next prime is 83457287. The reversal of 83457281 is 18275438.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83457281 - 2¹⁰ = 83456257 is a prime.

It is a super-2 number, since 2×83457281² = 13930235503825922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83457287) 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 in 7 ways as a sum of consecutive naturals, for example, 8630 + ... + 15536.

It is an arithmetic number, because the mean of its divisors is an integer number (10714308).

Almost surely, 2^83457281 is an apocalyptic number.

It is an amenable number.

83457281 is a deficient number, since it is larger than the sum of its proper divisors (2257183).

83457281 is a wasteful number, since it uses less digits than its factorization.

83457281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7231.

The product of its digits is 53760, while the sum is 38.

The square root of 83457281 is about 9135.4956625243. The cubic root of 83457281 is about 437.0066816106.

It can be divided in two parts, 83457 and 281, that added together give a palindrome (83738).

The spelling of 83457281 in words is "eighty-three million, four hundred fifty-seven thousand, two hundred eighty-one".