543491851 has 4 divisors (see below), whose sum is σ = 621133552. Its totient is φ = 465850152.

The previous prime is 543491849. The next prime is 543491857. The reversal of 543491851 is 158194345.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 543491851 - 2¹ = 543491849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (543491857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38820840 + ... + 38820853.

It is an arithmetic number, because the mean of its divisors is an integer number (155283388).

Almost surely, 2^543491851 is an apocalyptic number.

543491851 is a deficient number, since it is larger than the sum of its proper divisors (77641701).

543491851 is an equidigital number, since it uses as much as digits as its factorization.

543491851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77641700.

The product of its digits is 86400, while the sum is 40.

The square root of 543491851 is about 23312.9116800111. The cubic root of 543491851 is about 816.0767636317.

The spelling of 543491851 in words is "five hundred forty-three million, four hundred ninety-one thousand, eight hundred fifty-one".