15213221232 has 160 divisors (see below), whose sum is σ = 44398872576. Its totient is φ = 4447027200.

The previous prime is 15213221227. The next prime is 15213221251. The reversal of 15213221232 is 23212231251.

15213221232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5776588 + ... + 5779220.

Almost surely, 2^15213221232 is an apocalyptic number.

15213221232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15213221232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22199436288).

15213221232 is an abundant number, since it is smaller than the sum of its proper divisors (29185651344).

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

15213221232 is a wasteful number, since it uses less digits than its factorization.

15213221232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3039 (or 3033 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

Adding to 15213221232 its reverse (23212231251), we get a palindrome (38425452483).

The spelling of 15213221232 in words is "fifteen billion, two hundred thirteen million, two hundred twenty-one thousand, two hundred thirty-two".