15523220000 has 90 divisors (see below), whose sum is σ = 38232846729. Its totient is φ = 6202240000.

The previous prime is 15523219997. The next prime is 15523220059. The reversal of 15523220000 is 2232551.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 8 ways, for example, as 5491995664 + 10031224336 = 74108^2 + 100156^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=88100.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a Duffinian number.

It is an unprimeable number.

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 14 ways as a sum of consecutive naturals, for example, 17619560 + ... + 17620440.

Almost surely, 2^15523220000 is an apocalyptic number.

15523220000 is a gapful number since it is divisible by the number (10) 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 15523220000

15523220000 is an abundant number, since it is smaller than the sum of its proper divisors (22709626729).

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

15523220000 is an frugal number, since it uses more digits than its factorization.

15523220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

Adding to 15523220000 its reverse (2232551), we get a palindrome (15525452551).

The spelling of 15523220000 in words is "fifteen billion, five hundred twenty-three million, two hundred twenty thousand".