31043432242 has 4 divisors (see below), whose sum is σ = 46565148366. Its totient is φ = 15521716120.

The previous prime is 31043432239. The next prime is 31043432291. The reversal of 31043432242 is 24223434013.

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

It can be written as a sum of positive squares in only one way, i.e., 29192797881 + 1850634361 = 170859^2 + 43019^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31043432242.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7760858059 + ... + 7760858062.

Almost surely, 2^31043432242 is an apocalyptic number.

31043432242 is a deficient number, since it is larger than the sum of its proper divisors (15521716124).

31043432242 is a wasteful number, since it uses less digits than its factorization.

31043432242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15521716123.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 31043432242 its reverse (24223434013), we get a palindrome (55266866255).

The spelling of 31043432242 in words is "thirty-one billion, forty-three million, four hundred thirty-two thousand, two hundred forty-two".