15534223345420 has 96 divisors (see below), whose sum is σ = 36403146702720. Its totient is φ = 5528713881600.

The previous prime is 15534223345409. The next prime is 15534223345451. The reversal of 15534223345420 is 2454332243551.

15534223345420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2817529 + ... + 6245551.

It is an arithmetic number, because the mean of its divisors is an integer number (379199444820).

Almost surely, 2^{15534223345420} is an apocalyptic number.

15534223345420 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 15534223345420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18201573351360).

15534223345420 is an abundant number, since it is smaller than the sum of its proper divisors (20868923357300).

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

15534223345420 is a wasteful number, since it uses less digits than its factorization.

15534223345420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3428675 (or 3428673 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 43.

Adding to 15534223345420 its reverse (2454332243551), we get a palindrome (17988555588971).

The spelling of 15534223345420 in words is "fifteen trillion, five hundred thirty-four billion, two hundred twenty-three million, three hundred forty-five thousand, four hundred twenty".