31312343023 has 4 divisors (see below), whose sum is σ = 33720984808. Its totient is φ = 28903701240.

The previous prime is 31312343021. The next prime is 31312343057. The reversal of 31312343023 is 32034321313.

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 31312343023 - 2¹ = 31312343021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312343021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1204320873 + ... + 1204320898.

It is an arithmetic number, because the mean of its divisors is an integer number (8430246202).

Almost surely, 2^31312343023 is an apocalyptic number.

31312343023 is a deficient number, since it is larger than the sum of its proper divisors (2408641785).

31312343023 is a wasteful number, since it uses less digits than its factorization.

31312343023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408641784.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 31312343023 its reverse (32034321313), we get a palindrome (63346664336).

The spelling of 31312343023 in words is "thirty-one billion, three hundred twelve million, three hundred forty-three thousand, twenty-three".