31431103223 has 4 divisors (see below), whose sum is σ = 33848880408. Its totient is φ = 29013326040.

The previous prime is 31431103189. The next prime is 31431103243. The reversal of 31431103223 is 32230113413.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31431103223 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 (31431103243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1208888573 + ... + 1208888598.

It is an arithmetic number, because the mean of its divisors is an integer number (8462220102).

Almost surely, 2^31431103223 is an apocalyptic number.

31431103223 is a deficient number, since it is larger than the sum of its proper divisors (2417777185).

31431103223 is a wasteful number, since it uses less digits than its factorization.

31431103223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417777184.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31431103223 its reverse (32230113413), we get a palindrome (63661216636).

The spelling of 31431103223 in words is "thirty-one billion, four hundred thirty-one million, one hundred three thousand, two hundred twenty-three".