541547021 has 2 divisors, whose sum is σ = 541547022. Its totient is φ = 541547020.

The previous prime is 541547011. The next prime is 541547051. The reversal of 541547021 is 120745145.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 529506121 + 12040900 = 23011^2 + 3470^2 .

It is a cyclic number.

It is not a de Polignac number, because 541547021 - 2²⁶ = 474438157 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (541547011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270773510 + 270773511.

It is an arithmetic number, because the mean of its divisors is an integer number (270773511).

Almost surely, 2^541547021 is an apocalyptic number.

It is an amenable number.

541547021 is a deficient number, since it is larger than the sum of its proper divisors (1).

541547021 is an equidigital number, since it uses as much as digits as its factorization.

541547021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 541547021 is about 23271.1628630801. The cubic root of 541547021 is about 815.1021844852.

The spelling of 541547021 in words is "five hundred forty-one million, five hundred forty-seven thousand, twenty-one".