15530055312 has 20 divisors (see below), whose sum is σ = 40119309680. Its totient is φ = 5176685088.

The previous prime is 15530055293. The next prime is 15530055347. The reversal of 15530055312 is 21355003551.

It is a self number, because there is not a number n which added to its sum of digits gives 15530055312.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161771362 + ... + 161771457.

It is an arithmetic number, because the mean of its divisors is an integer number (2005965484).

Almost surely, 2^15530055312 is an apocalyptic number.

15530055312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15530055312 is an abundant number, since it is smaller than the sum of its proper divisors (24589254368).

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

15530055312 is a wasteful number, since it uses less digits than its factorization.

15530055312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323542830 (or 323542824 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 30.

Adding to 15530055312 its reverse (21355003551), we get a palindrome (36885058863).

The spelling of 15530055312 in words is "fifteen billion, five hundred thirty million, fifty-five thousand, three hundred twelve".