31243413133040 has 40 divisors (see below), whose sum is σ = 72641911194528. Its totient is φ = 12497197397760.

The previous prime is 31243413133033. The next prime is 31243413133061. The reversal of 31243413133040 is 4033131434213.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 31243413132988 and 31243413133006.

It is a congruent number.

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, 3458309 + ... + 8628251.

Almost surely, 2^{31243413133040} is an apocalyptic number.

It is an amenable number.

31243413133040 is an abundant number, since it is smaller than the sum of its proper divisors (41398498061488).

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

31243413133040 is a wasteful number, since it uses less digits than its factorization.

31243413133040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5245497 (or 5245491 counting only the distinct ones).

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

Adding to 31243413133040 its reverse (4033131434213), we get a palindrome (35276544567253).

The spelling of 31243413133040 in words is "thirty-one trillion, two hundred forty-three billion, four hundred thirteen million, one hundred thirty-three thousand, forty".