31340400404312 has 16 divisors (see below), whose sum is σ = 58764167649360. Its totient is φ = 15669955697824.

The previous prime is 31340400404311. The next prime is 31340400404389. The reversal of 31340400404312 is 21340400404313.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31340400404311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30017708 + ... + 31044219.

It is an arithmetic number, because the mean of its divisors is an integer number (3672760478085).

Almost surely, 2^{31340400404312} is an apocalyptic number.

It is an amenable number.

31340400404312 is a deficient number, since it is larger than the sum of its proper divisors (27423767245048).

31340400404312 is a wasteful number, since it uses less digits than its factorization.

31340400404312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61126090 (or 61126086 counting only the distinct ones).

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

Adding to 31340400404312 its reverse (21340400404313), we get a palindrome (52680800808625).

Subtracting from 31340400404312 its reverse (21340400404313), we obtain a palindrome (9999999999999).

The spelling of 31340400404312 in words is "thirty-one trillion, three hundred forty billion, four hundred million, four hundred four thousand, three hundred twelve".