31331122 has 4 divisors (see below), whose sum is σ = 46996686. Its totient is φ = 15665560.

The previous prime is 31331117. The next prime is 31331137. The reversal of 31331122 is 22113313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22113313 = 181 ⋅122173.

It can be written as a sum of positive squares in only one way, i.e., 16654561 + 14676561 = 4081^2 + 3831^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31331096 and 31331105.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7832779 + ... + 7832782.

Almost surely, 2^31331122 is an apocalyptic number.

31331122 is a deficient number, since it is larger than the sum of its proper divisors (15665564).

31331122 is a wasteful number, since it uses less digits than its factorization.

31331122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15665563.

The product of its digits is 108, while the sum is 16.

The square root of 31331122 is about 5597.4210132882. The cubic root of 31331122 is about 315.2525798140.

Adding to 31331122 its reverse (22113313), we get a palindrome (53444435).

It can be divided in two parts, 3133 and 1122, that multiplied together give a triangular number (3515226 = T₂₆₅₁).

The spelling of 31331122 in words is "thirty-one million, three hundred thirty-one thousand, one hundred twenty-two".