6543138031 has 2 divisors, whose sum is σ = 6543138032. Its totient is φ = 6543138030.

The previous prime is 6543137987. The next prime is 6543138037. The reversal of 6543138031 is 1308313456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6543138031 - 2⁷ = 6543137903 is a prime.

It is a super-2 number, since 2×6543138031² = 85625310585437113922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6543138037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271569015 + 3271569016.

It is an arithmetic number, because the mean of its divisors is an integer number (3271569016).

Almost surely, 2^6543138031 is an apocalyptic number.

6543138031 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543138031 is an equidigital number, since it uses as much as digits as its factorization.

6543138031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 6543138031 is about 80889.6657861806. The cubic root of 6543138031 is about 1870.3750218717.

The spelling of 6543138031 in words is "six billion, five hundred forty-three million, one hundred thirty-eight thousand, thirty-one".