543212521 has 2 divisors, whose sum is σ = 543212522. Its totient is φ = 543212520.

The previous prime is 543212497. The next prime is 543212531. The reversal of 543212521 is 125212345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 539168400 + 4044121 = 23220^2 + 2011^2 .

It is a cyclic number.

It is not a de Polignac number, because 543212521 - 2⁷ = 543212393 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (543212531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271606260 + 271606261.

It is an arithmetic number, because the mean of its divisors is an integer number (271606261).

Almost surely, 2^543212521 is an apocalyptic number.

It is an amenable number.

543212521 is a deficient number, since it is larger than the sum of its proper divisors (1).

543212521 is an equidigital number, since it uses as much as digits as its factorization.

543212521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 25.

The square root of 543212521 is about 23306.9200238899. The cubic root of 543212521 is about 815.9369309394.

Adding to 543212521 its reverse (125212345), we get a palindrome (668424866).

The spelling of 543212521 in words is "five hundred forty-three million, two hundred twelve thousand, five hundred twenty-one".