31020000032200 has 48 divisors (see below), whose sum is σ = 72126687318660. Its totient is φ = 12407107584000.

The previous prime is 31020000032143. The next prime is 31020000032207. The reversal of 31020000032200 is 223000002013.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 8235855353124 + 22784144679076 = 2869818^2 + 4773274^2 .

It is not an unprimeable number, because it can be changed into a prime (31020000032207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2786521 + ... + 8354920.

Almost surely, 2^{31020000032200} is an apocalyptic number.

It is an amenable number.

31020000032200 is an abundant number, since it is smaller than the sum of its proper divisors (41106687286460).

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

31020000032200 is a wasteful number, since it uses less digits than its factorization.

31020000032200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11155378 (or 11155369 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 31020000032200 its reverse (223000002013), we get a palindrome (31243000034213).

The spelling of 31020000032200 in words is "thirty-one trillion, twenty billion, thirty-two thousand, two hundred".