15055443140021 has 4 divisors (see below), whose sum is σ = 15091204288044. Its totient is φ = 15019681992000.

The previous prime is 15055443140011. The next prime is 15055443140081. The reversal of 15055443140021 is 12004134455051.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6333527222500 + 8721915917521 = 2516650^2 + 2953289^2 .

It is a cyclic number.

It is not a de Polignac number, because 15055443140021 - 2¹⁰ = 15055443138997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15055443140011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17880573380 + ... + 17880574221.

It is an arithmetic number, because the mean of its divisors is an integer number (3772801072011).

Almost surely, 2^{15055443140021} is an apocalyptic number.

It is an amenable number.

15055443140021 is a deficient number, since it is larger than the sum of its proper divisors (35761148023).

15055443140021 is an equidigital number, since it uses as much as digits as its factorization.

15055443140021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35761148022.

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 15055443140021 its reverse (12004134455051), we get a palindrome (27059577595072).

The spelling of 15055443140021 in words is "fifteen trillion, fifty-five billion, four hundred forty-three million, one hundred forty thousand, twenty-one".