31343202205540 has 24 divisors (see below), whose sum is σ = 68682495268800. Its totient is φ = 11992181713248.

The previous prime is 31343202205499. The next prime is 31343202205541. The reversal of 31343202205540 is 4550220234313.

It is a junction number, because it is equal to n+sod(n) for n = 31343202205496 and 31343202205505.

It is not an unprimeable number, because it can be changed into a prime (31343202205541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34068697590 + ... + 34068698509.

It is an arithmetic number, because the mean of its divisors is an integer number (2861770636200).

Almost surely, 2^{31343202205540} is an apocalyptic number.

It is an amenable number.

31343202205540 is an abundant number, since it is smaller than the sum of its proper divisors (37339293063260).

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

31343202205540 is a wasteful number, since it uses less digits than its factorization.

31343202205540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68137396131 (or 68137396129 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 34.

Adding to 31343202205540 its reverse (4550220234313), we get a palindrome (35893422439853).

The spelling of 31343202205540 in words is "thirty-one trillion, three hundred forty-three billion, two hundred two million, two hundred five thousand, five hundred forty".