31033442343 has 4 divisors (see below), whose sum is σ = 41377923128. Its totient is φ = 20688961560.

The previous prime is 31033442309. The next prime is 31033442347. The reversal of 31033442343 is 34324433013.

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

It is not a de Polignac number, because 31033442343 - 2²⁰ = 31032393767 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31033442343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31033442347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5172240388 + ... + 5172240393.

It is an arithmetic number, because the mean of its divisors is an integer number (10344480782).

Almost surely, 2^31033442343 is an apocalyptic number.

31033442343 is a deficient number, since it is larger than the sum of its proper divisors (10344480785).

31033442343 is a wasteful number, since it uses less digits than its factorization.

31033442343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10344480784.

The product of its (nonzero) digits is 31104, while the sum is 30.

Adding to 31033442343 its reverse (34324433013), we get a palindrome (65357875356).

The spelling of 31033442343 in words is "thirty-one billion, thirty-three million, four hundred forty-two thousand, three hundred forty-three".