52534544454421 has 4 divisors (see below), whose sum is σ = 52535296812492. Its totient is φ = 52533792096352.

The previous prime is 52534544454397. The next prime is 52534544454439. The reversal of 52534544454421 is 12445444543525.

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 31399055352196 + 21135489102225 = 5603486^2 + 4597335^2 .

It is a cyclic number.

It is not a de Polignac number, because 52534544454421 - 2¹¹ = 52534544452373 is a prime.

It is a super-2 number, since 2×52534544454421² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52534044454421) 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, 376074286 + ... + 376213951.

It is an arithmetic number, because the mean of its divisors is an integer number (13133824203123).

Almost surely, 2^{52534544454421} is an apocalyptic number.

It is an amenable number.

52534544454421 is a deficient number, since it is larger than the sum of its proper divisors (752358071).

52534544454421 is an equidigital number, since it uses as much as digits as its factorization.

52534544454421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752358070.

The product of its digits is 30720000, while the sum is 52.

Adding to 52534544454421 its reverse (12445444543525), we get a palindrome (64979988997946).

The spelling of 52534544454421 in words is "fifty-two trillion, five hundred thirty-four billion, five hundred forty-four million, four hundred fifty-four thousand, four hundred twenty-one".