31283145208 has 32 divisors (see below), whose sum is σ = 67047552000. Its totient is φ = 13404614112.

The previous prime is 31283145203. The next prime is 31283145233. The reversal of 31283145208 is 80254138213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31283145203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277093 + ... + 373291.

It is an arithmetic number, because the mean of its divisors is an integer number (2095236000).

Almost surely, 2^31283145208 is an apocalyptic number.

It is an amenable number.

31283145208 is an abundant number, since it is smaller than the sum of its proper divisors (35764406792).

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

31283145208 is a wasteful number, since it uses less digits than its factorization.

31283145208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102019 (or 102015 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The spelling of 31283145208 in words is "thirty-one billion, two hundred eighty-three million, one hundred forty-five thousand, two hundred eight".