6921112531 has 2 divisors, whose sum is σ = 6921112532. Its totient is φ = 6921112530.

The previous prime is 6921112487. The next prime is 6921112609. The reversal of 6921112531 is 1352111296.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6921112531 - 2²¹ = 6919015379 is a prime.

It is a super-2 number, since 2×6921112531² = 95803597333530451922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6921112493 and 6921112502.

It is not a weakly prime, because it can be changed into another prime (6921112831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3460556265 + 3460556266.

It is an arithmetic number, because the mean of its divisors is an integer number (3460556266).

Almost surely, 2^6921112531 is an apocalyptic number.

6921112531 is a deficient number, since it is larger than the sum of its proper divisors (1).

6921112531 is an equidigital number, since it uses as much as digits as its factorization.

6921112531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 31.

The square root of 6921112531 is about 83193.2240690310. The cubic root of 6921112531 is about 1905.7180036309.

The spelling of 6921112531 in words is "six billion, nine hundred twenty-one million, one hundred twelve thousand, five hundred thirty-one".