31203123332 has 12 divisors (see below), whose sum is σ = 55500637836. Its totient is φ = 15345798240.

The previous prime is 31203123319. The next prime is 31203123379. The reversal of 31203123332 is 23332130213.

It can be written as a sum of positive squares in 2 ways, for example, as 10820992576 + 20382130756 = 104024^2 + 142766^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31203123298 and 31203123307.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63940583 + ... + 63941070.

It is an arithmetic number, because the mean of its divisors is an integer number (4625053153).

Almost surely, 2^31203123332 is an apocalyptic number.

It is an amenable number.

31203123332 is a deficient number, since it is larger than the sum of its proper divisors (24297514504).

31203123332 is a wasteful number, since it uses less digits than its factorization.

31203123332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127881718 (or 127881716 counting only the distinct ones).

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

Adding to 31203123332 its reverse (23332130213), we get a palindrome (54535253545).

The spelling of 31203123332 in words is "thirty-one billion, two hundred three million, one hundred twenty-three thousand, three hundred thirty-two".