31045543243 has 16 divisors (see below), whose sum is σ = 36559791072. Its totient is φ = 25990272000.

The previous prime is 31045543237. The next prime is 31045543253. The reversal of 31045543243 is 34234554013.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-31045543243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31045543199 and 31045543208.

It is not an unprimeable number, because it can be changed into a prime (31045543253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197638 + ... + 318043.

It is an arithmetic number, because the mean of its divisors is an integer number (2284986942).

Almost surely, 2^31045543243 is an apocalyptic number.

31045543243 is a deficient number, since it is larger than the sum of its proper divisors (5514247829).

31045543243 is a wasteful number, since it uses less digits than its factorization.

31045543243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516126.

The product of its (nonzero) digits is 86400, while the sum is 34.

The spelling of 31045543243 in words is "thirty-one billion, forty-five million, five hundred forty-three thousand, two hundred forty-three".