83560221 has 16 divisors (see below), whose sum is σ = 127787520. Its totient is φ = 53909280.

The previous prime is 83560201. The next prime is 83560237. The reversal of 83560221 is 12206538.

83560221 is a `hidden beast` number, since 8 + 35 + 602 + 21 = 666.

It is not a de Polignac number, because 83560221 - 2⁷ = 83560093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83560201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49080 + ... + 50753.

It is an arithmetic number, because the mean of its divisors is an integer number (7986720).

Almost surely, 2^83560221 is an apocalyptic number.

It is an amenable number.

83560221 is a deficient number, since it is larger than the sum of its proper divisors (44227299).

83560221 is a wasteful number, since it uses less digits than its factorization.

83560221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99873 (or 99867 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 83560221 is about 9141.1279938528. The cubic root of 83560221 is about 437.1862824164.

Adding to 83560221 its reverse (12206538), we get a palindrome (95766759).

The spelling of 83560221 in words is "eighty-three million, five hundred sixty thousand, two hundred twenty-one".