31440141243040 has 96 divisors (see below), whose sum is σ = 79101194351760. Its totient is φ = 11767870439424.

The previous prime is 31440141242977. The next prime is 31440141243041. The reversal of 31440141243040 is 4034214104413.

It can be written as a sum of positive squares in 8 ways, for example, as 30435920799376 + 1004220443664 = 5516876^2 + 1002108^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31440141242993 and 31440141243011.

It is not an unprimeable number, because it can be changed into a prime (31440141243041) 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, 32936595 + ... + 33877714.

Almost surely, 2^{31440141243040} is an apocalyptic number.

It is an amenable number.

31440141243040 is an abundant number, since it is smaller than the sum of its proper divisors (47661053108720).

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

31440141243040 is a wasteful number, since it uses less digits than its factorization.

31440141243040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66814514 (or 66814506 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 31440141243040 its reverse (4034214104413), we get a palindrome (35474355347453).

The spelling of 31440141243040 in words is "thirty-one trillion, four hundred forty billion, one hundred forty-one million, two hundred forty-three thousand, forty".