543996228721 has 27 divisors (see below), whose sum is σ = 631252360683. Its totient is φ = 468380737440.

The previous prime is 543996228691. The next prime is 543996228731. The reversal of 543996228721 is 127822699345.

The square root of 543996228721 is 737561.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 50855211121 + 493141017600 = 225511^2 + 702240^2 .

It is not a de Polignac number, because 543996228721 - 2⁷ = 543996228593 is a prime.

It is a super-3 number, since 3×543996228721³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (543996228731) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 154148485 + ... + 154152013.

Almost surely, 2^543996228721 is an apocalyptic number.

543996228721 is the 737561-st square number.

543996228721 is the 368781-st centered octagonal number.

It is an amenable number.

543996228721 is a deficient number, since it is larger than the sum of its proper divisors (87256131962).

543996228721 is an frugal number, since it uses more digits than its factorization.

543996228721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7118 (or 3559 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 58.

The spelling of 543996228721 in words is "five hundred forty-three billion, nine hundred ninety-six million, two hundred twenty-eight thousand, seven hundred twenty-one".