15315210220 has 24 divisors (see below), whose sum is σ = 32689189008. Its totient is φ = 6025656000.

The previous prime is 15315210199. The next prime is 15315210263. The reversal of 15315210220 is 2201251351.

It is a junction number, because it is equal to n+sod(n) for n = 15315210191 and 15315210200.

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, 6275506 + ... + 6277945.

It is an arithmetic number, because the mean of its divisors is an integer number (1362049542).

Almost surely, 2^15315210220 is an apocalyptic number.

15315210220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15315210220 is an abundant number, since it is smaller than the sum of its proper divisors (17373978788).

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

15315210220 is a wasteful number, since it uses less digits than its factorization.

15315210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12553521 (or 12553519 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 15315210220 its reverse (2201251351), we get a palindrome (17516461571).

The spelling of 15315210220 in words is "fifteen billion, three hundred fifteen million, two hundred ten thousand, two hundred twenty".