312143304120040 has 32 divisors (see below), whose sum is σ = 702452086305480. Its totient is φ = 124834272397312.

The previous prime is 312143304119993. The next prime is 312143304120077. The reversal of 312143304120040 is 40021403341213.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 261576215129124 + 50567088990916 = 16173318^2 + 7111054^2 .

It is a junction number, because it is equal to n+sod(n) for n = 312143304119990 and 312143304120008.

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, 720069697 + ... + 720503056.

Almost surely, 2^{312143304120040} is an apocalyptic number.

It is an amenable number.

312143304120040 is an abundant number, since it is smaller than the sum of its proper divisors (390308782185440).

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

312143304120040 is a wasteful number, since it uses less digits than its factorization.

312143304120040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440578181 (or 1440578177 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 312143304120040 its reverse (40021403341213), we get a palindrome (352164707461253).

The spelling of 312143304120040 in words is "three hundred twelve trillion, one hundred forty-three billion, three hundred four million, one hundred twenty thousand, forty".