7140640831 has 2 divisors, whose sum is σ = 7140640832. Its totient is φ = 7140640830.

The previous prime is 7140640817. The next prime is 7140640867. The reversal of 7140640831 is 1380460417.

It is a happy number.

7140640831 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7140640831 - 2¹⁷ = 7140509759 is a prime.

It is a super-2 number, since 2×7140640831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7140640891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3570320415 + 3570320416.

It is an arithmetic number, because the mean of its divisors is an integer number (3570320416).

Almost surely, 2^7140640831 is an apocalyptic number.

7140640831 is a deficient number, since it is larger than the sum of its proper divisors (1).

7140640831 is an equidigital number, since it uses as much as digits as its factorization.

7140640831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 7140640831 is about 84502.3125778224. The cubic root of 7140640831 is about 1925.6575776518.

The spelling of 7140640831 in words is "seven billion, one hundred forty million, six hundred forty thousand, eight hundred thirty-one".