431325221 has 4 divisors (see below), whose sum is σ = 433971552. Its totient is φ = 428678892.

The previous prime is 431325211. The next prime is 431325319. The reversal of 431325221 is 122523134.

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 431325221 - 2¹⁰ = 431324197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431325211) 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, 1322921 + ... + 1323246.

It is an arithmetic number, because the mean of its divisors is an integer number (108492888).

Almost surely, 2^431325221 is an apocalyptic number.

It is an amenable number.

431325221 is a deficient number, since it is larger than the sum of its proper divisors (2646331).

431325221 is a wasteful number, since it uses less digits than its factorization.

431325221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2646330.

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

The square root of 431325221 is about 20768.3706871772. The cubic root of 431325221 is about 755.5588284084.

Adding to 431325221 its reverse (122523134), we get a palindrome (553848355).

The spelling of 431325221 in words is "four hundred thirty-one million, three hundred twenty-five thousand, two hundred twenty-one".