31000304140 has 48 divisors (see below), whose sum is σ = 70751640960. Its totient is φ = 11341244160.

The previous prime is 31000304123. The next prime is 31000304143. The reversal of 31000304140 is 4140300013.

It is a super-2 number, since 2×31000304140² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31000304143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 518596 + ... + 575275.

It is an arithmetic number, because the mean of its divisors is an integer number (1473992520).

Almost surely, 2^31000304140 is an apocalyptic number.

It is an amenable number.

31000304140 is an abundant number, since it is smaller than the sum of its proper divisors (39751336820).

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

31000304140 is a wasteful number, since it uses less digits than its factorization.

31000304140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094002 (or 1094000 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31000304140 its reverse (4140300013), we get a palindrome (35140604153).

The spelling of 31000304140 in words is "thirty-one billion, three hundred four thousand, one hundred forty".