541443821 has 2 divisors, whose sum is σ = 541443822. Its totient is φ = 541443820.

The previous prime is 541443757. The next prime is 541443839. The reversal of 541443821 is 128344145.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 525555625 + 15888196 = 22925^2 + 3986^2 .

It is a cyclic number.

It is not a de Polignac number, because 541443821 - 2⁶ = 541443757 is a prime.

It is a super-2 number, since 2×541443821² = 586322822598160082, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (541443841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270721910 + 270721911.

It is an arithmetic number, because the mean of its divisors is an integer number (270721911).

Almost surely, 2^541443821 is an apocalyptic number.

It is an amenable number.

541443821 is a deficient number, since it is larger than the sum of its proper divisors (1).

541443821 is an equidigital number, since it uses as much as digits as its factorization.

541443821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15360, while the sum is 32.

The square root of 541443821 is about 23268.9454208823. The cubic root of 541443821 is about 815.0504045005.

Adding to 541443821 its reverse (128344145), we get a palindrome (669787966).

The spelling of 541443821 in words is "five hundred forty-one million, four hundred forty-three thousand, eight hundred twenty-one".