31606332223 has 4 divisors (see below), whose sum is σ = 32202678168. Its totient is φ = 31009986280.

The previous prime is 31606332217. The next prime is 31606332227. The reversal of 31606332223 is 32223360613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32223360613 = 29537 ⋅1090949.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31606332223 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 (31606332227) 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, 298172893 + ... + 298172998.

It is an arithmetic number, because the mean of its divisors is an integer number (8050669542).

Almost surely, 2^31606332223 is an apocalyptic number.

31606332223 is a deficient number, since it is larger than the sum of its proper divisors (596345945).

31606332223 is an equidigital number, since it uses as much as digits as its factorization.

31606332223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596345944.

The product of its (nonzero) digits is 23328, while the sum is 31.

Adding to 31606332223 its reverse (32223360613), we get a palindrome (63829692836).

The spelling of 31606332223 in words is "thirty-one billion, six hundred six million, three hundred thirty-two thousand, two hundred twenty-three".