31000314040 has 16 divisors (see below), whose sum is σ = 69750706680. Its totient is φ = 12400125600.

The previous prime is 31000314017. The next prime is 31000314067. The reversal of 31000314040 is 4041300013.

It is a super-2 number, since 2×31000314040² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 387503886 + ... + 387503965.

Almost surely, 2^31000314040 is an apocalyptic number.

It is an amenable number.

31000314040 is an abundant number, since it is smaller than the sum of its proper divisors (38750392640).

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

31000314040 is a wasteful number, since it uses less digits than its factorization.

31000314040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775007862 (or 775007858 counting only the distinct ones).

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

Adding to 31000314040 its reverse (4041300013), we get a palindrome (35041614053).

The spelling of 31000314040 in words is "thirty-one billion, three hundred fourteen thousand, forty".