31400042516120 has 32 divisors (see below), whose sum is σ = 70652582488800. Its totient is φ = 12559574903808.

The previous prime is 31400042516077. The next prime is 31400042516131. The reversal of 31400042516120 is 2161524000413.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12663929 + ... + 14939048.

It is an arithmetic number, because the mean of its divisors is an integer number (2207893202775).

Almost surely, 2^{31400042516120} is an apocalyptic number.

It is an amenable number.

31400042516120 is an abundant number, since it is smaller than the sum of its proper divisors (39252539972680).

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

31400042516120 is a wasteful number, since it uses less digits than its factorization.

31400042516120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27631427 (or 27631423 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 31400042516120 its reverse (2161524000413), we get a palindrome (33561566516533).

The spelling of 31400042516120 in words is "thirty-one trillion, four hundred billion, forty-two million, five hundred sixteen thousand, one hundred twenty".