83955221 has 32 divisors (see below), whose sum is σ = 104552448. Its totient is φ = 65862720.

The previous prime is 83955217. The next prime is 83955239. The reversal of 83955221 is 12255938.

It is not a de Polignac number, because 83955221 - 2² = 83955217 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83955211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 463751 + ... + 463931.

It is an arithmetic number, because the mean of its divisors is an integer number (3267264).

Almost surely, 2^83955221 is an apocalyptic number.

It is an amenable number.

83955221 is a deficient number, since it is larger than the sum of its proper divisors (20597227).

83955221 is a wasteful number, since it uses less digits than its factorization.

83955221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321.

The product of its digits is 21600, while the sum is 35.

The square root of 83955221 is about 9162.7081695315. The cubic root of 83955221 is about 437.8740785342.

The spelling of 83955221 in words is "eighty-three million, nine hundred fifty-five thousand, two hundred twenty-one".