31345232143111 has 4 divisors (see below), whose sum is σ = 31372000062424. Its totient is φ = 31318464223800.

The previous prime is 31345232143051. The next prime is 31345232143117. The reversal of 31345232143111 is 11134123254313.

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

It is a cyclic number.

It is not a de Polignac number, because 31345232143111 - 2³³ = 31336642208519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31345232143117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13383957900 + ... + 13383960241.

It is an arithmetic number, because the mean of its divisors is an integer number (7843000015606).

Almost surely, 2^{31345232143111} is an apocalyptic number.

31345232143111 is a deficient number, since it is larger than the sum of its proper divisors (26767919313).

31345232143111 is a wasteful number, since it uses less digits than its factorization.

31345232143111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26767919312.

The product of its digits is 25920, while the sum is 34.

Adding to 31345232143111 its reverse (11134123254313), we get a palindrome (42479355397424).

The spelling of 31345232143111 in words is "thirty-one trillion, three hundred forty-five billion, two hundred thirty-two million, one hundred forty-three thousand, one hundred eleven".