31200203213 has 8 divisors (see below), whose sum is σ = 31609685400. Its totient is φ = 30793389120.

The previous prime is 31200203197. The next prime is 31200203227. The reversal of 31200203213 is 31230200213.

It can be written as a sum of positive squares in 4 ways, for example, as 5228302249 + 25971900964 = 72307^2 + 161158^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31200203213 - 2⁴ = 31200203197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31200203191 and 31200203200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31200208213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 643478 + ... + 690263.

It is an arithmetic number, because the mean of its divisors is an integer number (3951210675).

Almost surely, 2^31200203213 is an apocalyptic number.

It is an amenable number.

31200203213 is a deficient number, since it is larger than the sum of its proper divisors (409482187).

31200203213 is a wasteful number, since it uses less digits than its factorization.

31200203213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334047.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31200203213 its reverse (31230200213), we get a palindrome (62430403426).

The spelling of 31200203213 in words is "thirty-one billion, two hundred million, two hundred three thousand, two hundred thirteen".