431645513 has 4 divisors (see below), whose sum is σ = 464849028. Its totient is φ = 398442000.

The previous prime is 431645503. The next prime is 431645551. The reversal of 431645513 is 315546134.

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 97377424 + 334268089 = 9868^2 + 18283^2 .

It is a cyclic number.

It is not a de Polignac number, because 431645513 - 2⁴ = 431645497 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 431645513.

It is not an unprimeable number, because it can be changed into a prime (431645503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16601738 + ... + 16601763.

It is an arithmetic number, because the mean of its divisors is an integer number (116212257).

Almost surely, 2^431645513 is an apocalyptic number.

It is an amenable number.

431645513 is a deficient number, since it is larger than the sum of its proper divisors (33203515).

431645513 is a wasteful number, since it uses less digits than its factorization.

431645513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33203514.

The product of its digits is 21600, while the sum is 32.

The square root of 431645513 is about 20776.0803088552. The cubic root of 431645513 is about 755.7458022278.

The spelling of 431645513 in words is "four hundred thirty-one million, six hundred forty-five thousand, five hundred thirteen".