31320234443 has 4 divisors (see below), whose sum is σ = 31321545720. Its totient is φ = 31318923168.

The previous prime is 31320234419. The next prime is 31320234481. The reversal of 31320234443 is 34443202313.

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 31320234443 - 2²² = 31316040139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31320234493) 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, 619133 + ... + 667806.

It is an arithmetic number, because the mean of its divisors is an integer number (7830386430).

Almost surely, 2^31320234443 is an apocalyptic number.

31320234443 is a deficient number, since it is larger than the sum of its proper divisors (1311277).

31320234443 is a wasteful number, since it uses less digits than its factorization.

31320234443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311276.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 31320234443 its reverse (34443202313), we get a palindrome (65763436756).

The spelling of 31320234443 in words is "thirty-one billion, three hundred twenty million, two hundred thirty-four thousand, four hundred forty-three".