543215561 has 8 divisors (see below), whose sum is σ = 626514240. Its totient is φ = 461341008.

The previous prime is 543215551. The next prime is 543215579. The reversal of 543215561 is 165512345.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 543215561 - 2¹⁰ = 543214537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (543215551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355211 + ... + 356736.

It is an arithmetic number, because the mean of its divisors is an integer number (78314280).

Almost surely, 2^543215561 is an apocalyptic number.

It is an amenable number.

543215561 is a deficient number, since it is larger than the sum of its proper divisors (83298679).

543215561 is a wasteful number, since it uses less digits than its factorization.

543215561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712063.

The product of its digits is 18000, while the sum is 32.

The square root of 543215561 is about 23306.9852404810. The cubic root of 543215561 is about 815.9384530224.

The spelling of 543215561 in words is "five hundred forty-three million, two hundred fifteen thousand, five hundred sixty-one".