83507281 has 16 divisors (see below), whose sum is σ = 103880448. Its totient is φ = 65952000.

The previous prime is 83507279. The next prime is 83507293. The reversal of 83507281 is 18270538.

It is a cyclic number.

It is not a de Polignac number, because 83507281 - 2¹ = 83507279 is a prime.

It is a super-2 number, since 2×83507281² = 13946931960025922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83507251) 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 15 ways as a sum of consecutive naturals, for example, 14745 + ... + 19606.

It is an arithmetic number, because the mean of its divisors is an integer number (6492528).

Almost surely, 2^83507281 is an apocalyptic number.

It is an amenable number.

83507281 is a deficient number, since it is larger than the sum of its proper divisors (20373167).

83507281 is a wasteful number, since it uses less digits than its factorization.

83507281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34392.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 83507281 is about 9138.2318311586. The cubic root of 83507281 is about 437.0939357191.

The spelling of 83507281 in words is "eighty-three million, five hundred seven thousand, two hundred eighty-one".