8140258731 has 16 divisors (see below), whose sum is σ = 11842974720. Its totient is φ = 4932407520.

The previous prime is 8140258723. The next prime is 8140258747. The reversal of 8140258731 is 1378520418.

It is not a de Polignac number, because 8140258731 - 2³ = 8140258723 is a prime.

It is a super-2 number, since 2×8140258731² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8140258731.

It is not an unprimeable number, because it can be changed into a prime (8140258771) 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, 141205 + ... + 190313.

It is an arithmetic number, because the mean of its divisors is an integer number (740185920).

Almost surely, 2^8140258731 is an apocalyptic number.

8140258731 is a deficient number, since it is larger than the sum of its proper divisors (3702715989).

8140258731 is a wasteful number, since it uses less digits than its factorization.

8140258731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54146.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 8140258731 is about 90223.3823961394. The cubic root of 8140258731 is about 2011.6205778998.

The spelling of 8140258731 in words is "eight billion, one hundred forty million, two hundred fifty-eight thousand, seven hundred thirty-one".