541504210421 has 4 divisors (see below), whose sum is σ = 541512105612. Its totient is φ = 541496315232.

The previous prime is 541504210363. The next prime is 541504210517. The reversal of 541504210421 is 124012405145.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124012405145 = 5 ⋅24802481029.

It can be written as a sum of positive squares in 2 ways, for example, as 266786712196 + 274717498225 = 516514^2 + 524135^2 .

It is a cyclic number.

It is not a de Polignac number, because 541504210421 - 2²² = 541500016117 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 (541504210921) 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, 3843806 + ... + 3982191.

It is an arithmetic number, because the mean of its divisors is an integer number (135378026403).

Almost surely, 2^541504210421 is an apocalyptic number.

It is an amenable number.

541504210421 is a deficient number, since it is larger than the sum of its proper divisors (7895191).

541504210421 is an equidigital number, since it uses as much as digits as its factorization.

541504210421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7895190.

The product of its (nonzero) digits is 6400, while the sum is 29.

Adding to 541504210421 its reverse (124012405145), we get a palindrome (665516615566).

The spelling of 541504210421 in words is "five hundred forty-one billion, five hundred four million, two hundred ten thousand, four hundred twenty-one".