83320221 has 8 divisors (see below), whose sum is σ = 111775840. Its totient is φ = 55205712.

The previous prime is 83320199. The next prime is 83320231. The reversal of 83320221 is 12202338.

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

It is not a de Polignac number, because 83320221 - 2⁷ = 83320093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83320231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84706 + ... + 85683.

It is an arithmetic number, because the mean of its divisors is an integer number (13971980).

Almost surely, 2^83320221 is an apocalyptic number.

It is an amenable number.

83320221 is a deficient number, since it is larger than the sum of its proper divisors (28455619).

83320221 is a wasteful number, since it uses less digits than its factorization.

83320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170555.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 83320221 is about 9127.9910714242. The cubic root of 83320221 is about 436.7673218100.

Adding to 83320221 its reverse (12202338), we get a palindrome (95522559).

The spelling of 83320221 in words is "eighty-three million, three hundred twenty thousand, two hundred twenty-one".