31143234113 has 4 divisors (see below), whose sum is σ = 31145492868. Its totient is φ = 31140975360.

The previous prime is 31143234097. The next prime is 31143234139.

31143234113 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8910038449 + 22233195664 = 94393^2 + 149108^2 .

It is a cyclic number.

It is not a de Polignac number, because 31143234113 - 2⁴ = 31143234097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31143234413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1108568 + ... + 1136313.

It is an arithmetic number, because the mean of its divisors is an integer number (7786373217).

Almost surely, 2^31143234113 is an apocalyptic number.

It is an amenable number.

31143234113 is a deficient number, since it is larger than the sum of its proper divisors (2258755).

31143234113 is a wasteful number, since it uses less digits than its factorization.

31143234113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258754.

The product of its digits is 2592, while the sum is 26.

The spelling of 31143234113 in words is "thirty-one billion, one hundred forty-three million, two hundred thirty-four thousand, one hundred thirteen".