83211111 has 16 divisors (see below), whose sum is σ = 123421920. Its totient is φ = 55408320.

The previous prime is 83211101. The next prime is 83211143. The reversal of 83211111 is 11111238.

It is a happy number.

It is not a de Polignac number, because 83211111 - 2⁷ = 83210983 is a prime.

83211111 is a modest number, since divided by 11111 gives 832 as remainder.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83211101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34501 + ... + 36833.

It is an arithmetic number, because the mean of its divisors is an integer number (7713870).

Almost surely, 2^83211111 is an apocalyptic number.

83211111 is a deficient number, since it is larger than the sum of its proper divisors (40210809).

83211111 is a wasteful number, since it uses less digits than its factorization.

83211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663 (or 3657 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

The square root of 83211111 is about 9122.0124424383. The cubic root of 83211111 is about 436.5765857990.

Adding to 83211111 its reverse (11111238), we get a palindrome (94322349).

The spelling of 83211111 in words is "eighty-three million, two hundred eleven thousand, one hundred eleven".