31240004243 has 24 divisors (see below), whose sum is σ = 38232984384. Its totient is φ = 25417929600.

The previous prime is 31240004233. The next prime is 31240004267. The reversal of 31240004243 is 34240004213.

It is not a de Polignac number, because 31240004243 - 2²⁶ = 31172895379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31240004233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135803 + ... + 284468.

It is an arithmetic number, because the mean of its divisors is an integer number (1593041016).

Almost surely, 2^31240004243 is an apocalyptic number.

31240004243 is a deficient number, since it is larger than the sum of its proper divisors (6992980141).

31240004243 is a wasteful number, since it uses less digits than its factorization.

31240004243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420363 (or 420356 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 31240004243 its reverse (34240004213), we get a palindrome (65480008456).

The spelling of 31240004243 in words is "thirty-one billion, two hundred forty million, four thousand, two hundred forty-three".