31234440443 has 4 divisors (see below), whose sum is σ = 31236795720. Its totient is φ = 31232085168.

The previous prime is 31234440439. The next prime is 31234440451. The reversal of 31234440443 is 34404443213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34404443213 = 7 ⋅4914920459.

It is a cyclic number.

It is not a de Polignac number, because 31234440443 - 2² = 31234440439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31234410443) 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, 1157633 + ... + 1184306.

It is an arithmetic number, because the mean of its divisors is an integer number (7809198930).

Almost surely, 2^31234440443 is an apocalyptic number.

31234440443 is a deficient number, since it is larger than the sum of its proper divisors (2355277).

31234440443 is a wasteful number, since it uses less digits than its factorization.

31234440443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355276.

The product of its (nonzero) digits is 55296, while the sum is 32.

Adding to 31234440443 its reverse (34404443213), we get a palindrome (65638883656).

The spelling of 31234440443 in words is "thirty-one billion, two hundred thirty-four million, four hundred forty thousand, four hundred forty-three".