6999220331 has 16 divisors (see below), whose sum is σ = 7836611328. Its totient is φ = 6219494400.

The previous prime is 6999220313. The next prime is 6999220343. The reversal of 6999220331 is 1330229996.

It is a cyclic number.

It is not a de Polignac number, because 6999220331 - 2¹⁰ = 6999219307 is a prime.

It is a super-2 number, since 2×6999220331² = 97978170483767499122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6999220301) 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, 140360 + ... + 183573.

It is an arithmetic number, because the mean of its divisors is an integer number (489788208).

Almost surely, 2^6999220331 is an apocalyptic number.

6999220331 is a deficient number, since it is larger than the sum of its proper divisors (837390997).

6999220331 is a wasteful number, since it uses less digits than its factorization.

6999220331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324022.

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 6999220331 is about 83661.3431101844. The cubic root of 6999220331 is about 1912.8601585572.

The spelling of 6999220331 in words is "six billion, nine hundred ninety-nine million, two hundred twenty thousand, three hundred thirty-one".