83538281 has 4 divisors (see below), whose sum is σ = 83556564. Its totient is φ = 83520000.

The previous prime is 83538263. The next prime is 83538283. The reversal of 83538281 is 18283538.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 46022656 + 37515625 = 6784^2 + 6125^2 .

It is a cyclic number.

It is not a de Polignac number, because 83538281 - 2¹⁴ = 83521897 is a prime.

It is a super-2 number, since 2×83538281² = 13957288784869922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83538283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4361 + ... + 13641.

It is an arithmetic number, because the mean of its divisors is an integer number (20889141).

Almost surely, 2^83538281 is an apocalyptic number.

83538281 is the 4088-th centered decagonal number.

It is an amenable number.

83538281 is a deficient number, since it is larger than the sum of its proper divisors (18283).

83538281 is an equidigital number, since it uses as much as digits as its factorization.

83538281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18282.

The product of its digits is 46080, while the sum is 38.

The square root of 83538281 is about 9139.9278443541. The cubic root of 83538281 is about 437.1480157765.

The spelling of 83538281 in words is "eighty-three million, five hundred thirty-eight thousand, two hundred eighty-one".