31204312043 has 4 divisors (see below), whose sum is σ = 31208733360. Its totient is φ = 31199890728.

The previous prime is 31204311997. The next prime is 31204312049. The reversal of 31204312043 is 34021340213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34021340213 = 7 ⋅4860191459.

It is a cyclic number.

It is not a de Polignac number, because 31204312043 - 2¹⁴ = 31204295659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31204312049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2200055 + ... + 2214192.

It is an arithmetic number, because the mean of its divisors is an integer number (7802183340).

Almost surely, 2^31204312043 is an apocalyptic number.

31204312043 is a deficient number, since it is larger than the sum of its proper divisors (4421317).

31204312043 is an equidigital number, since it uses as much as digits as its factorization.

31204312043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4421316.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31204312043 its reverse (34021340213), we get a palindrome (65225652256).

The spelling of 31204312043 in words is "thirty-one billion, two hundred four million, three hundred twelve thousand, forty-three".