431384545 has 4 divisors (see below), whose sum is σ = 517661460. Its totient is φ = 345107632.

The previous prime is 431384519. The next prime is 431384579. The reversal of 431384545 is 545483134.

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

It can be written as a sum of positive squares in 2 ways, for example, as 260402769 + 170981776 = 16137^2 + 13076^2 .

It is a cyclic number.

It is not a de Polignac number, because 431384545 - 2¹⁵ = 431351777 is a prime.

It is an unprimeable number.

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, 43138450 + ... + 43138459.

It is an arithmetic number, because the mean of its divisors is an integer number (129415365).

Almost surely, 2^431384545 is an apocalyptic number.

It is an amenable number.

431384545 is a deficient number, since it is larger than the sum of its proper divisors (86276915).

431384545 is an equidigital number, since it uses as much as digits as its factorization.

431384545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86276914.

The product of its digits is 115200, while the sum is 37.

The square root of 431384545 is about 20769.7988675866. The cubic root of 431384545 is about 755.5934663992.

The spelling of 431384545 in words is "four hundred thirty-one million, three hundred eighty-four thousand, five hundred forty-five".