31355423545220 has 24 divisors (see below), whose sum is σ = 65848135444224. Its totient is φ = 12541836846816.

The previous prime is 31355423545219. The next prime is 31355423545223. The reversal of 31355423545220 is 2254532455313.

31355423545220 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (31355423545223) 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, 20011892 + ... + 21521771.

It is an arithmetic number, because the mean of its divisors is an integer number (2743672310176).

Almost surely, 2^{31355423545220} is an apocalyptic number.

It is an amenable number.

31355423545220 is an abundant number, since it is smaller than the sum of its proper divisors (34492711899004).

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

31355423545220 is a wasteful number, since it uses less digits than its factorization.

31355423545220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41571419 (or 41571417 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 44.

The spelling of 31355423545220 in words is "thirty-one trillion, three hundred fifty-five billion, four hundred twenty-three million, five hundred forty-five thousand, two hundred twenty".