15315322112 has 72 divisors (see below), whose sum is σ = 30943359720. Its totient is φ = 7564820480.

The previous prime is 15315322111. The next prime is 15315322189. The reversal of 15315322112 is 21122351351.

It can be written as a sum of positive squares in 4 ways, for example, as 957531136 + 14357790976 = 30944^2 + 119824^2 .

It is a super-2 number, since 2×15315322112² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15315322111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11252312 + ... + 11253672.

It is an arithmetic number, because the mean of its divisors is an integer number (429768885).

Almost surely, 2^15315322112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15315322112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15471679860).

15315322112 is an abundant number, since it is smaller than the sum of its proper divisors (15628037608).

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

15315322112 is a wasteful number, since it uses less digits than its factorization.

15315322112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879 (or 1865 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

Adding to 15315322112 its reverse (21122351351), we get a palindrome (36437673463).

The spelling of 15315322112 in words is "fifteen billion, three hundred fifteen million, three hundred twenty-two thousand, one hundred twelve".