431322213 has 24 divisors (see below), whose sum is σ = 664977088. Its totient is φ = 243606528.

The previous prime is 431322167. The next prime is 431322223. The reversal of 431322213 is 312223134.

It is not a de Polignac number, because 431322213 - 2¹⁷ = 431191141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 431322213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431322223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165045 + ... + 167637.

Almost surely, 2^431322213 is an apocalyptic number.

It is an amenable number.

431322213 is a deficient number, since it is larger than the sum of its proper divisors (233654875).

431322213 is an equidigital number, since it uses as much as digits as its factorization.

431322213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781 (or 2692 counting only the distinct ones).

The product of its digits is 864, while the sum is 21.

The square root of 431322213 is about 20768.2982692372. The cubic root of 431322213 is about 755.5570720181.

Adding to 431322213 its reverse (312223134), we get a palindrome (743545347).

The spelling of 431322213 in words is "four hundred thirty-one million, three hundred twenty-two thousand, two hundred thirteen".