31400323213144 has 128 divisors (see below), whose sum is σ = 62066062598400. Its totient is φ = 14879904399360.

The previous prime is 31400323213117. The next prime is 31400323213183. The reversal of 31400323213144 is 44131232300413.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 401104534 + ... + 401182810.

It is an arithmetic number, because the mean of its divisors is an integer number (484891114050).

Almost surely, 2^{31400323213144} is an apocalyptic number.

It is an amenable number.

31400323213144 is a deficient number, since it is larger than the sum of its proper divisors (30665739385256).

31400323213144 is a wasteful number, since it uses less digits than its factorization.

31400323213144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78653 (or 78649 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 31400323213144 its reverse (44131232300413), we get a palindrome (75531555513557).

The spelling of 31400323213144 in words is "thirty-one trillion, four hundred billion, three hundred twenty-three million, two hundred thirteen thousand, one hundred forty-four".