31323132233 has 16 divisors (see below), whose sum is σ = 33330709440. Its totient is φ = 29351808000.

The previous prime is 31323132229. The next prime is 31323132241. The reversal of 31323132233 is 33223132313.

It is a happy number.

It is not a de Polignac number, because 31323132233 - 2² = 31323132229 is a prime.

It is a super-2 number, since 2×31323132233² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31323132263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4200158 + ... + 4207608.

It is an arithmetic number, because the mean of its divisors is an integer number (2083169340).

Almost surely, 2^31323132233 is an apocalyptic number.

It is an amenable number.

31323132233 is a deficient number, since it is larger than the sum of its proper divisors (2007577207).

31323132233 is a wasteful number, since it uses less digits than its factorization.

31323132233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9848.

The product of its digits is 5832, while the sum is 26.

Adding to 31323132233 its reverse (33223132313), we get a palindrome (64546264546).

The spelling of 31323132233 in words is "thirty-one billion, three hundred twenty-three million, one hundred thirty-two thousand, two hundred thirty-three".