31143003123 has 4 divisors (see below), whose sum is σ = 41524004168. Its totient is φ = 20762002080.

The previous prime is 31143003083. The next prime is 31143003127. The reversal of 31143003123 is 32130034113.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31143003123 - 2⁸ = 31143002867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31143003123.

It is not an unprimeable number, because it can be changed into a prime (31143003127) 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, 5190500518 + ... + 5190500523.

It is an arithmetic number, because the mean of its divisors is an integer number (10381001042).

Almost surely, 2^31143003123 is an apocalyptic number.

31143003123 is a deficient number, since it is larger than the sum of its proper divisors (10381001045).

31143003123 is a wasteful number, since it uses less digits than its factorization.

31143003123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10381001044.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31143003123 its reverse (32130034113), we get a palindrome (63273037236).

The spelling of 31143003123 in words is "thirty-one billion, one hundred forty-three million, three thousand, one hundred twenty-three".