541563613421 has 4 divisors (see below), whose sum is σ = 542106807612. Its totient is φ = 541020419232.

The previous prime is 541563613373. The next prime is 541563613433. The reversal of 541563613421 is 124316365145.

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 420260475625 + 121303137796 = 648275^2 + 348286^2 .

It is a cyclic number.

It is not a de Polignac number, because 541563613421 - 2¹⁴ = 541563597037 is a prime.

It is a super-2 number, since 2×541563613421² (a number of 24 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 (541563613021) 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, 271595600 + ... + 271597593.

It is an arithmetic number, because the mean of its divisors is an integer number (135526701903).

Almost surely, 2^541563613421 is an apocalyptic number.

It is an amenable number.

541563613421 is a deficient number, since it is larger than the sum of its proper divisors (543194191).

541563613421 is an equidigital number, since it uses as much as digits as its factorization.

541563613421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543194190.

The product of its digits is 259200, while the sum is 41.

Adding to 541563613421 its reverse (124316365145), we get a palindrome (665879978566).

The spelling of 541563613421 in words is "five hundred forty-one billion, five hundred sixty-three million, six hundred thirteen thousand, four hundred twenty-one".