31440302304140 has 24 divisors (see below), whose sum is σ = 66024779406432. Its totient is φ = 12576093384960.

The previous prime is 31440302304139. The next prime is 31440302304179. The reversal of 31440302304140 is 4140320304413.

It is a happy number.

It is a super-2 number, since 2×31440302304140² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

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, 9391412 + ... + 12291428.

It is an arithmetic number, because the mean of its divisors is an integer number (2751032475268).

Almost surely, 2^{31440302304140} is an apocalyptic number.

It is an amenable number.

31440302304140 is an abundant number, since it is smaller than the sum of its proper divisors (34584477102292).

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

31440302304140 is a wasteful number, since it uses less digits than its factorization.

31440302304140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3442097 (or 3442095 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 31440302304140 its reverse (4140320304413), we get a palindrome (35580622608553).

The spelling of 31440302304140 in words is "thirty-one trillion, four hundred forty billion, three hundred two million, three hundred four thousand, one hundred forty".