31323010231 has 4 divisors (see below), whose sum is σ = 31836502264. Its totient is φ = 30809518200.

The previous prime is 31323010217. The next prime is 31323010237. The reversal of 31323010231 is 13201032313.

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 31323010231 - 2²³ = 31314621623 is a prime.

It is a super-2 number, since 2×31323010231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31323010199 and 31323010208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31323010237) 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, 256745925 + ... + 256746046.

It is an arithmetic number, because the mean of its divisors is an integer number (7959125566).

Almost surely, 2^31323010231 is an apocalyptic number.

31323010231 is a deficient number, since it is larger than the sum of its proper divisors (513492033).

31323010231 is an equidigital number, since it uses as much as digits as its factorization.

31323010231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513492032.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31323010231 its reverse (13201032313), we get a palindrome (44524042544).

The spelling of 31323010231 in words is "thirty-one billion, three hundred twenty-three million, ten thousand, two hundred thirty-one".