83211291 has 12 divisors (see below), whose sum is σ = 122752032. Its totient is φ = 54293616.

The previous prime is 83211287. The next prime is 83211301. The reversal of 83211291 is 19211238.

It is not a de Polignac number, because 83211291 - 2² = 83211287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83211211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97936 + ... + 98781.

It is an arithmetic number, because the mean of its divisors is an integer number (10229336).

Almost surely, 2^83211291 is an apocalyptic number.

83211291 is a deficient number, since it is larger than the sum of its proper divisors (39540741).

83211291 is a wasteful number, since it uses less digits than its factorization.

83211291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196770 (or 196767 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 83211291 is about 9122.0223086770. The cubic root of 83211291 is about 436.5769005957.

The spelling of 83211291 in words is "eighty-three million, two hundred eleven thousand, two hundred ninety-one".