83561281 has 8 divisors (see below), whose sum is σ = 86091584. Its totient is φ = 81045360.

The previous prime is 83561243. The next prime is 83561311. The reversal of 83561281 is 18216538.

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 83561281 - 2⁹ = 83560769 is a prime.

It is a super-2 number, since 2×83561281² = 13964975364721922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83561201) 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, 8836 + ... + 15658.

It is an arithmetic number, because the mean of its divisors is an integer number (10761448).

Almost surely, 2^83561281 is an apocalyptic number.

It is an amenable number.

83561281 is a deficient number, since it is larger than the sum of its proper divisors (2530303).

83561281 is a wasteful number, since it uses less digits than its factorization.

83561281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7191.

The product of its digits is 11520, while the sum is 34.

The square root of 83561281 is about 9141.1859733844. The cubic root of 83561281 is about 437.1881310452.

The spelling of 83561281 in words is "eighty-three million, five hundred sixty-one thousand, two hundred eighty-one".