31105323106 has 48 divisors (see below), whose sum is σ = 55286719992. Its totient is φ = 13037840640.

The previous prime is 31105323103. The next prime is 31105323127. The reversal of 31105323106 is 60132350113.

It can be written as a sum of positive squares in 4 ways, for example, as 17624952081 + 13480371025 = 132759^2 + 116105^2 .

It is a super-2 number, since 2×31105323106² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31105323103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3446656 + ... + 3455668.

Almost surely, 2^31105323106 is an apocalyptic number.

31105323106 is a deficient number, since it is larger than the sum of its proper divisors (24181396886).

31105323106 is a wasteful number, since it uses less digits than its factorization.

31105323106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10147 (or 10136 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 25.

Adding to 31105323106 its reverse (60132350113), we get a palindrome (91237673219).

The spelling of 31105323106 in words is "thirty-one billion, one hundred five million, three hundred twenty-three thousand, one hundred six".