31103302203220 has 48 divisors (see below), whose sum is σ = 72766876790160. Its totient is φ = 11088285981696.

The previous prime is 31103302203217. The next prime is 31103302203251. The reversal of 31103302203220 is 2230220330113.

It can be written as a sum of positive squares in 8 ways, for example, as 133676521924 + 30969625681296 = 365618^2 + 5565036^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31103302203191 and 31103302203200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2062545657 + ... + 2062560736.

It is an arithmetic number, because the mean of its divisors is an integer number (1515976599795).

Almost surely, 2^{31103302203220} is an apocalyptic number.

It is an amenable number.

31103302203220 is an abundant number, since it is smaller than the sum of its proper divisors (41663574586940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31103302203220 is a wasteful number, since it uses less digits than its factorization.

31103302203220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4125106444 (or 4125106442 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31103302203220 its reverse (2230220330113), we get a palindrome (33333522533333).

The spelling of 31103302203220 in words is "thirty-one trillion, one hundred three billion, three hundred two million, two hundred three thousand, two hundred twenty".