543121403 has 16 divisors (see below), whose sum is σ = 624464640. Its totient is φ = 467172000.

The previous prime is 543121391. The next prime is 543121417. The reversal of 543121403 is 304121345.

It is not a de Polignac number, because 543121403 - 2¹⁰ = 543120379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (543121463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284753 + ... + 286653.

It is an arithmetic number, because the mean of its divisors is an integer number (39029040).

Almost surely, 2^543121403 is an apocalyptic number.

543121403 is a deficient number, since it is larger than the sum of its proper divisors (81343237).

543121403 is a wasteful number, since it uses less digits than its factorization.

543121403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3298.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 543121403 is about 23304.9652005747. The cubic root of 543121403 is about 815.8913068692.

Adding to 543121403 its reverse (304121345), we get a palindrome (847242748).

The spelling of 543121403 in words is "five hundred forty-three million, one hundred twenty-one thousand, four hundred three".