6987172231 has 16 divisors (see below), whose sum is σ = 7858819584. Its totient is φ = 6163765344.

The previous prime is 6987172219. The next prime is 6987172237. The reversal of 6987172231 is 1322717896.

It is a cyclic number.

It is not a de Polignac number, because 6987172231 - 2⁷ = 6987172103 is a prime.

It is a super-2 number, since 2×6987172231² = 97641151571315034722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6987172237) 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, 345070 + ... + 364756.

It is an arithmetic number, because the mean of its divisors is an integer number (491176224).

Almost surely, 2^6987172231 is an apocalyptic number.

6987172231 is a deficient number, since it is larger than the sum of its proper divisors (871647353).

6987172231 is a wasteful number, since it uses less digits than its factorization.

6987172231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20910.

The product of its digits is 254016, while the sum is 46.

The square root of 6987172231 is about 83589.3069178110. The cubic root of 6987172231 is about 1911.7619616325.

The spelling of 6987172231 in words is "six billion, nine hundred eighty-seven million, one hundred seventy-two thousand, two hundred thirty-one".