31231113322 has 4 divisors (see below), whose sum is σ = 46846669986. Its totient is φ = 15615556660.

The previous prime is 31231113283. The next prime is 31231113343. The reversal of 31231113322 is 22331113213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 30771825561 + 459287761 = 175419^2 + 21431^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31231113293 and 31231113302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7807778329 + ... + 7807778332.

Almost surely, 2^31231113322 is an apocalyptic number.

31231113322 is a deficient number, since it is larger than the sum of its proper divisors (15615556664).

31231113322 is a wasteful number, since it uses less digits than its factorization.

31231113322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15615556663.

The product of its digits is 648, while the sum is 22.

Adding to 31231113322 its reverse (22331113213), we get a palindrome (53562226535).

The spelling of 31231113322 in words is "thirty-one billion, two hundred thirty-one million, one hundred thirteen thousand, three hundred twenty-two".