1631871113 has 16 divisors (see below), whose sum is σ = 1711575360. Its totient is φ = 1554431424.

The previous prime is 1631871083. The next prime is 1631871139. The reversal of 1631871113 is 3111781361.

It is not a de Polignac number, because 1631871113 - 2⁸ = 1631870857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1631871113.

It is not an unprimeable number, because it can be changed into a prime (1631871173) 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, 392198 + ... + 396336.

It is an arithmetic number, because the mean of its divisors is an integer number (106973460).

Almost surely, 2^1631871113 is an apocalyptic number.

It is an amenable number.

1631871113 is a deficient number, since it is larger than the sum of its proper divisors (79704247).

1631871113 is a wasteful number, since it uses less digits than its factorization.

1631871113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4408.

The product of its digits is 3024, while the sum is 32.

The square root of 1631871113 is about 40396.4245076220. The cubic root of 1631871113 is about 1177.3220687894.

The spelling of 1631871113 in words is "one billion, six hundred thirty-one million, eight hundred seventy-one thousand, one hundred thirteen".