31312143433040 has 80 divisors (see below), whose sum is σ = 74578913269056. Its totient is φ = 12218954880000.

The previous prime is 31312143433027. The next prime is 31312143433057. The reversal of 31312143433040 is 4033434121313.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 31312143432988 and 31312143433006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106265915 + ... + 106560165.

Almost surely, 2^{31312143433040} is an apocalyptic number.

It is an amenable number.

31312143433040 is an abundant number, since it is smaller than the sum of its proper divisors (43266769836016).

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

31312143433040 is a wasteful number, since it uses less digits than its factorization.

31312143433040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326748 (or 326742 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 31312143433040 its reverse (4033434121313), we get a palindrome (35345577554353).

The spelling of 31312143433040 in words is "thirty-one trillion, three hundred twelve billion, one hundred forty-three million, four hundred thirty-three thousand, forty".