31313222202 has 16 divisors (see below), whose sum is σ = 64646652672. Its totient is φ = 10101039360.

The previous prime is 31313222197. The next prime is 31313222209. The reversal of 31313222202 is 20222231313.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31313222209) 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, 84175143 + ... + 84175514.

It is an arithmetic number, because the mean of its divisors is an integer number (4040415792).

Almost surely, 2^31313222202 is an apocalyptic number.

31313222202 is an abundant number, since it is smaller than the sum of its proper divisors (33333430470).

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

31313222202 is a wasteful number, since it uses less digits than its factorization.

31313222202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168350693.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31313222202 its reverse (20222231313), we get a palindrome (51535453515).

The spelling of 31313222202 in words is "thirty-one billion, three hundred thirteen million, two hundred twenty-two thousand, two hundred two".