31431142202140 has 24 divisors (see below), whose sum is σ = 66026836038240. Its totient is φ = 12568373563968.

The previous prime is 31431142202111. The next prime is 31431142202293. The reversal of 31431142202140 is 4120224113413.

It is a happy number.

It is a super-2 number, since 2×31431142202140² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31431142202099 and 31431142202108.

It is a congruent number.

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, 255144187 + ... + 255267346.

It is an arithmetic number, because the mean of its divisors is an integer number (2751118168260).

Almost surely, 2^{31431142202140} is an apocalyptic number.

It is an amenable number.

31431142202140 is an abundant number, since it is smaller than the sum of its proper divisors (34595693836100).

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

31431142202140 is a wasteful number, since it uses less digits than its factorization.

31431142202140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510414621 (or 510414619 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 31431142202140 its reverse (4120224113413), we get a palindrome (35551366315553).

The spelling of 31431142202140 in words is "thirty-one trillion, four hundred thirty-one billion, one hundred forty-two million, two hundred two thousand, one hundred forty".