15221204304 has 160 divisors (see below), whose sum is σ = 42408535680. Its totient is φ = 4689985536.

The previous prime is 15221204291. The next prime is 15221204309. The reversal of 15221204304 is 40340212251.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15221204309) 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 31 ways as a sum of consecutive naturals, for example, 6456694 + ... + 6459050.

It is an arithmetic number, because the mean of its divisors is an integer number (265053348).

Almost surely, 2^15221204304 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 15221204304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21204267840).

15221204304 is an abundant number, since it is smaller than the sum of its proper divisors (27187331376).

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

15221204304 is a wasteful number, since it uses less digits than its factorization.

15221204304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557 (or 2551 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 15221204304 its reverse (40340212251), we get a palindrome (55561416555).

The spelling of 15221204304 in words is "fifteen billion, two hundred twenty-one million, two hundred four thousand, three hundred four".