312131401401340 has 48 divisors (see below), whose sum is σ = 678081229570080. Its totient is φ = 120546825557760.

The previous prime is 312131401401269. The next prime is 312131401401341. The reversal of 312131401401340 is 43104104131213.

It is a junction number, because it is equal to n+sod(n) for n = 312131401401299 and 312131401401308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312131401401341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170399530 + ... + 172221550.

It is an arithmetic number, because the mean of its divisors is an integer number (14126692282710).

Almost surely, 2^{312131401401340} is an apocalyptic number.

It is an amenable number.

312131401401340 is an abundant number, since it is smaller than the sum of its proper divisors (365949828168740).

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

312131401401340 is a wasteful number, since it uses less digits than its factorization.

312131401401340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117422 (or 2117420 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 312131401401340 its reverse (43104104131213), we get a palindrome (355235505532553).

The spelling of 312131401401340 in words is "three hundred twelve trillion, one hundred thirty-one billion, four hundred one million, four hundred one thousand, three hundred forty".