31243401340 has 24 divisors (see below), whose sum is σ = 67007126592. Its totient is φ = 12231458880.

The previous prime is 31243401323. The next prime is 31243401353. The reversal of 31243401340 is 4310434213.

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, 16617891 + ... + 16619770.

It is an arithmetic number, because the mean of its divisors is an integer number (2791963608).

Almost surely, 2^31243401340 is an apocalyptic number.

It is an amenable number.

31243401340 is an abundant number, since it is smaller than the sum of its proper divisors (35763725252).

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

31243401340 is a wasteful number, since it uses less digits than its factorization.

31243401340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33237717 (or 33237715 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31243401340 its reverse (4310434213), we get a palindrome (35553835553).

The spelling of 31243401340 in words is "thirty-one billion, two hundred forty-three million, four hundred one thousand, three hundred forty".