31311122 has 8 divisors (see below), whose sum is σ = 47397900. Its totient is φ = 15511824.

The previous prime is 31311121. The next prime is 31311131. The reversal of 31311122 is 22111313.

It can be written as a sum of positive squares in 2 ways, for example, as 29800681 + 1510441 = 5459^2 + 1229^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 31311097 and 31311106.

It is not an unprimeable number, because it can be changed into a prime (31311121) 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 3 ways as a sum of consecutive naturals, for example, 71597 + ... + 72032.

Almost surely, 2^31311122 is an apocalyptic number.

31311122 is a deficient number, since it is larger than the sum of its proper divisors (16086778).

31311122 is a wasteful number, since it uses less digits than its factorization.

31311122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143740.

The product of its digits is 36, while the sum is 14.

The square root of 31311122 is about 5595.6341910457. The cubic root of 31311122 is about 315.1854857845.

Adding to 31311122 its reverse (22111313), we get a palindrome (53422435).

The spelling of 31311122 in words is "thirty-one million, three hundred eleven thousand, one hundred twenty-two".