431220043 has 4 divisors (see below), whose sum is σ = 432898200. Its totient is φ = 429541888.

The previous prime is 431220019. The next prime is 431220059. The reversal of 431220043 is 340022134.

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 431220043 - 2¹⁷ = 431088971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 431220043.

It is not an unprimeable number, because it can be changed into a prime (431220743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 838693 + ... + 839206.

It is an arithmetic number, because the mean of its divisors is an integer number (108224550).

Almost surely, 2^431220043 is an apocalyptic number.

431220043 is a deficient number, since it is larger than the sum of its proper divisors (1678157).

431220043 is a wasteful number, since it uses less digits than its factorization.

431220043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678156.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 431220043 is about 20765.8383649686. The cubic root of 431220043 is about 755.4974094582.

Adding to 431220043 its reverse (340022134), we get a palindrome (771242177).

The spelling of 431220043 in words is "four hundred thirty-one million, two hundred twenty thousand, forty-three".