31303020222 has 12 divisors (see below), whose sum is σ = 67823210520. Its totient is φ = 10434340068.

The previous prime is 31303020187. The next prime is 31303020223. The reversal of 31303020222 is 22202030313.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1739056679 = 31303020222 / (3 + 1 + 3 + 0 + 3 + 0 + 2 + 0 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 31303020195 and 31303020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31303020223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 869528322 + ... + 869528357.

It is an arithmetic number, because the mean of its divisors is an integer number (5651934210).

Almost surely, 2^31303020222 is an apocalyptic number.

31303020222 is an abundant number, since it is smaller than the sum of its proper divisors (36520190298).

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

31303020222 is a wasteful number, since it uses less digits than its factorization.

31303020222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739056687 (or 1739056684 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 31303020222 its reverse (22202030313), we get a palindrome (53505050535).

The spelling of 31303020222 in words is "thirty-one billion, three hundred three million, twenty thousand, two hundred twenty-two".