31324140443 has 4 divisors (see below), whose sum is σ = 31458579048. Its totient is φ = 31189701840.

The previous prime is 31324140307. The next prime is 31324140493. The reversal of 31324140443 is 34404142313.

It is a happy number.

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 31324140443 - 2¹⁴ = 31324124059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31324140493) 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, 67218953 + ... + 67219418.

It is an arithmetic number, because the mean of its divisors is an integer number (7864644762).

Almost surely, 2^31324140443 is an apocalyptic number.

31324140443 is a deficient number, since it is larger than the sum of its proper divisors (134438605).

31324140443 is a wasteful number, since it uses less digits than its factorization.

31324140443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134438604.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 31324140443 its reverse (34404142313), we get a palindrome (65728282756).

The spelling of 31324140443 in words is "thirty-one billion, three hundred twenty-four million, one hundred forty thousand, four hundred forty-three".