31013400043 has 4 divisors (see below), whose sum is σ = 31022117680. Its totient is φ = 31004682408.

The previous prime is 31013399953. The next prime is 31013400151. The reversal of 31013400043 is 34000431013.

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 31013400043 - 2⁹ = 31013399531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31013404043) 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, 4353480 + ... + 4360597.

It is an arithmetic number, because the mean of its divisors is an integer number (7755529420).

Almost surely, 2^31013400043 is an apocalyptic number.

31013400043 is a deficient number, since it is larger than the sum of its proper divisors (8717637).

31013400043 is an equidigital number, since it uses as much as digits as its factorization.

31013400043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8717636.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31013400043 its reverse (34000431013), we get a palindrome (65013831056).

It can be divided in two parts, 31013 and 400043, that added together give a triangular number (431056 = T₉₂₈).

The spelling of 31013400043 in words is "thirty-one billion, thirteen million, four hundred thousand, forty-three".