31340043 has 12 divisors (see below), whose sum is σ = 51736048. Its totient is φ = 17908560.

The previous prime is 31340009. The next prime is 31340051. The reversal of 31340043 is 34004313.

It is not a de Polignac number, because 31340043 - 2¹⁰ = 31339019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31339998 and 31340025.

It is not an unprimeable number, because it can be changed into a prime (31340003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 248668 + ... + 248793.

Almost surely, 2^31340043 is an apocalyptic number.

31340043 is a deficient number, since it is larger than the sum of its proper divisors (20396005).

31340043 is a wasteful number, since it uses less digits than its factorization.

31340043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497474 (or 497471 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 31340043 is about 5598.2178414206. The cubic root of 31340043 is about 315.2824978976.

Adding to 31340043 its reverse (34004313), we get a palindrome (65344356).

The spelling of 31340043 in words is "thirty-one million, three hundred forty thousand, forty-three".