543221451 has 48 divisors (see below), whose sum is σ = 875318400. Its totient is φ = 332712576.

The previous prime is 543221407. The next prime is 543221453. The reversal of 543221451 is 154122345.

It is not a de Polignac number, because 543221451 - 2¹⁰ = 543220427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (543221453) 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 47 ways as a sum of consecutive naturals, for example, 334720 + ... + 336338.

It is an arithmetic number, because the mean of its divisors is an integer number (18235800).

Almost surely, 2^543221451 is an apocalyptic number.

543221451 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

543221451 is a deficient number, since it is larger than the sum of its proper divisors (332096949).

543221451 is a wasteful number, since it uses less digits than its factorization.

543221451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705 (or 1682 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 543221451 is about 23307.1115971070. Note that the first 3 decimals coincide. The cubic root of 543221451 is about 815.9414020421.

Adding to 543221451 its reverse (154122345), we get a palindrome (697343796).

The spelling of 543221451 in words is "five hundred forty-three million, two hundred twenty-one thousand, four hundred fifty-one".