31123203332 has 24 divisors (see below), whose sum is σ = 60677866200. Its totient is φ = 13869225216.

The previous prime is 31123203301. The next prime is 31123203347. The reversal of 31123203332 is 23330232113.

It can be written as a sum of positive squares in 4 ways, for example, as 4193080516 + 26930122816 = 64754^2 + 164104^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31123203298 and 31123203307.

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 in 7 ways as a sum of consecutive naturals, for example, 10317857 + ... + 10320872.

It is an arithmetic number, because the mean of its divisors is an integer number (2528244425).

Almost surely, 2^31123203332 is an apocalyptic number.

It is an amenable number.

31123203332 is a deficient number, since it is larger than the sum of its proper divisors (29554662868).

31123203332 is a wasteful number, since it uses less digits than its factorization.

31123203332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20638775 (or 20638773 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 31123203332 its reverse (23330232113), we get a palindrome (54453435445).

The spelling of 31123203332 in words is "thirty-one billion, one hundred twenty-three million, two hundred three thousand, three hundred thirty-two".