6783112221 has 16 divisors (see below), whose sum is σ = 9195542400. Its totient is φ = 4446429120.

The previous prime is 6783112211. The next prime is 6783112241. The reversal of 6783112221 is 1222113876.

It is a de Polignac number, because none of the positive numbers 2^k-6783112221 is a prime.

It is a super-2 number, since 2×6783112221² = 92021222805359105682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6783112211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 849355 + ... + 857303.

It is an arithmetic number, because the mean of its divisors is an integer number (574721400).

Almost surely, 2^6783112221 is an apocalyptic number.

6783112221 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

6783112221 is a deficient number, since it is larger than the sum of its proper divisors (2412430179).

6783112221 is a wasteful number, since it uses less digits than its factorization.

6783112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12676.

The product of its digits is 8064, while the sum is 33.

The square root of 6783112221 is about 82359.6516566213. The cubic root of 6783112221 is about 1892.9668157452.

The spelling of 6783112221 in words is "six billion, seven hundred eighty-three million, one hundred twelve thousand, two hundred twenty-one".