83331220 has 48 divisors (see below), whose sum is σ = 200527488. Its totient is φ = 28494720.

The previous prime is 83331167. The next prime is 83331221. The reversal of 83331220 is 2213338.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 83331191 and 83331200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83331221) 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, 85335 + ... + 86305.

It is an arithmetic number, because the mean of its divisors is an integer number (4177656).

Almost surely, 2^83331220 is an apocalyptic number.

It is an amenable number.

83331220 is an abundant number, since it is smaller than the sum of its proper divisors (117196268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83331220 is a wasteful number, since it uses less digits than its factorization.

83331220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600 (or 1598 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 83331220 is about 9128.5935389851. The cubic root of 83331220 is about 436.7865400035.

Adding to 83331220 its reverse (2213338), we get a palindrome (85544558).

The spelling of 83331220 in words is "eighty-three million, three hundred thirty-one thousand, two hundred twenty".