31143013113 has 16 divisors (see below), whose sum is σ = 42317199360. Its totient is φ = 20365597824.

The previous prime is 31143013103. The next prime is 31143013151. The reversal of 31143013113 is 31131034113.

It is not a de Polignac number, because 31143013113 - 2²¹ = 31140915961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31143013113.

It is not an unprimeable number, because it can be changed into a prime (31143013103) 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, 757320 + ... + 797382.

It is an arithmetic number, because the mean of its divisors is an integer number (2644824960).

Almost surely, 2^31143013113 is an apocalyptic number.

It is an amenable number.

31143013113 is a deficient number, since it is larger than the sum of its proper divisors (11174186247).

31143013113 is a wasteful number, since it uses less digits than its factorization.

31143013113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45008.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 31143013113 its reverse (31131034113), we get a palindrome (62274047226).

The spelling of 31143013113 in words is "thirty-one billion, one hundred forty-three million, thirteen thousand, one hundred thirteen".