31603431343 has 12 divisors (see below), whose sum is σ = 34743738960. Its totient is φ = 28725361280.

The previous prime is 31603431331. The next prime is 31603431371. The reversal of 31603431343 is 34313430613.

It is a de Polignac number, because none of the positive numbers 2^k-31603431343 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 (31603431383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 789846 + ... + 828892.

It is an arithmetic number, because the mean of its divisors is an integer number (2895311580).

Almost surely, 2^31603431343 is an apocalyptic number.

31603431343 is a deficient number, since it is larger than the sum of its proper divisors (3140307617).

31603431343 is a wasteful number, since it uses less digits than its factorization.

31603431343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45758 (or 45747 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 31.

Adding to 31603431343 its reverse (34313430613), we get a palindrome (65916861956).

The spelling of 31603431343 in words is "thirty-one billion, six hundred three million, four hundred thirty-one thousand, three hundred forty-three".