31135122 has 24 divisors (see below), whose sum is σ = 67644876. Its totient is φ = 10349856.

The previous prime is 31135121. The next prime is 31135147. The reversal of 31135122 is 22153113.

31135122 is a `hidden beast` number, since 311 + 351 + 2 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 24890121 + 6245001 = 4989^2 + 2499^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31135095 and 31135104.

It is not an unprimeable number, because it can be changed into a prime (31135121) 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 11 ways as a sum of consecutive naturals, for example, 4968 + ... + 9324.

Almost surely, 2^31135122 is an apocalyptic number.

31135122 is an abundant number, since it is smaller than the sum of its proper divisors (36509754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31135122 is a wasteful number, since it uses less digits than its factorization.

31135122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4762 (or 4759 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 31135122 is about 5579.8854826959. The cubic root of 31135122 is about 314.5938226619.

Adding to 31135122 its reverse (22153113), we get a palindrome (53288235).

Subtracting from 31135122 its reverse (22153113), we obtain a square (8982009 = 2997²).

The spelling of 31135122 in words is "thirty-one million, one hundred thirty-five thousand, one hundred twenty-two".