431321613 has 4 divisors (see below), whose sum is σ = 575095488. Its totient is φ = 287547740.

The previous prime is 431321609. The next prime is 431321623. The reversal of 431321613 is 316123134.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 431321613 - 2² = 431321609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431321623) 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, 71886933 + ... + 71886938.

It is an arithmetic number, because the mean of its divisors is an integer number (143773872).

Almost surely, 2^431321613 is an apocalyptic number.

It is an amenable number.

431321613 is a deficient number, since it is larger than the sum of its proper divisors (143773875).

431321613 is a wasteful number, since it uses less digits than its factorization.

431321613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143773874.

The product of its digits is 1296, while the sum is 24.

The square root of 431321613 is about 20768.2838241392. The cubic root of 431321613 is about 755.5567216734.

Adding to 431321613 its reverse (316123134), we get a palindrome (747444747).

The spelling of 431321613 in words is "four hundred thirty-one million, three hundred twenty-one thousand, six hundred thirteen".