31533521545340 has 48 divisors (see below), whose sum is σ = 66511632448800. Its totient is φ = 12557960785920.

The previous prime is 31533521545327. The next prime is 31533521545349. The reversal of 31533521545340 is 4354512533513.

It is a junction number, because it is equal to n+sod(n) for n = 31533521545291 and 31533521545300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31533521545349) 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, 18708299 + ... + 20324061.

It is an arithmetic number, because the mean of its divisors is an integer number (1385659009350).

Almost surely, 2^{31533521545340} is an apocalyptic number.

It is an amenable number.

31533521545340 is an abundant number, since it is smaller than the sum of its proper divisors (34978110903460).

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

31533521545340 is a wasteful number, since it uses less digits than its factorization.

31533521545340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620062 (or 1620060 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 44.

The spelling of 31533521545340 in words is "thirty-one trillion, five hundred thirty-three billion, five hundred twenty-one million, five hundred forty-five thousand, three hundred forty".