31543204242 has 64 divisors (see below), whose sum is σ = 71333084160. Its totient is φ = 9211003200.

The previous prime is 31543204229. The next prime is 31543204261. The reversal of 31543204242 is 24240234513.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 985267 + ... + 1016777.

It is an arithmetic number, because the mean of its divisors is an integer number (1114579440).

Almost surely, 2^31543204242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31543204242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35666542080).

31543204242 is an abundant number, since it is smaller than the sum of its proper divisors (39789879918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31543204242 is a wasteful number, since it uses less digits than its factorization.

31543204242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32079.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 31543204242 its reverse (24240234513), we get a palindrome (55783438755).

The spelling of 31543204242 in words is "thirty-one billion, five hundred forty-three million, two hundred four thousand, two hundred forty-two".