31323761243 has 4 divisors (see below), whose sum is σ = 31378812360. Its totient is φ = 31268710128.

The previous prime is 31323761167. The next prime is 31323761279. The reversal of 31323761243 is 34216732313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34216732313 = 37 ⋅924776549.

It is a cyclic number.

It is not a de Polignac number, because 31323761243 - 2¹⁰ = 31323760219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31323760243) 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, 27524705 + ... + 27525842.

It is an arithmetic number, because the mean of its divisors is an integer number (7844703090).

Almost surely, 2^31323761243 is an apocalyptic number.

31323761243 is a deficient number, since it is larger than the sum of its proper divisors (55051117).

31323761243 is an equidigital number, since it uses as much as digits as its factorization.

31323761243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55051116.

The product of its digits is 54432, while the sum is 35.

The spelling of 31323761243 in words is "thirty-one billion, three hundred twenty-three million, seven hundred sixty-one thousand, two hundred forty-three".