31020223203 has 12 divisors (see below), whose sum is σ = 45760329888. Its totient is φ = 20240145360.

The previous prime is 31020223193. The next prime is 31020223237. The reversal of 31020223203 is 30232202013.

It is a happy number.

It is not a de Polignac number, because 31020223203 - 2¹⁶ = 31020157667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31020222203) 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 11 ways as a sum of consecutive naturals, for example, 36666508 + ... + 36667353.

It is an arithmetic number, because the mean of its divisors is an integer number (3813360824).

Almost surely, 2^31020223203 is an apocalyptic number.

31020223203 is a deficient number, since it is larger than the sum of its proper divisors (14740106685).

31020223203 is a wasteful number, since it uses less digits than its factorization.

31020223203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73333914 (or 73333911 counting only the distinct ones).

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

Adding to 31020223203 its reverse (30232202013), we get a palindrome (61252425216).

The spelling of 31020223203 in words is "thirty-one billion, twenty million, two hundred twenty-three thousand, two hundred three".