431312213 has 4 divisors (see below), whose sum is σ = 431394240. Its totient is φ = 431230188.

The previous prime is 431312201. The next prime is 431312221. The reversal of 431312213 is 312213134.

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 431312213 - 2⁸ = 431311957 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 (431312263) 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, 32543 + ... + 43836.

It is an arithmetic number, because the mean of its divisors is an integer number (107848560).

Almost surely, 2^431312213 is an apocalyptic number.

It is an amenable number.

431312213 is a deficient number, since it is larger than the sum of its proper divisors (82027).

431312213 is an equidigital number, since it uses as much as digits as its factorization.

431312213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82026.

The product of its digits is 432, while the sum is 20.

The square root of 431312213 is about 20768.0575162917. The cubic root of 431312213 is about 755.5512328961.

Adding to 431312213 its reverse (312213134), we get a palindrome (743525347).

The spelling of 431312213 in words is "four hundred thirty-one million, three hundred twelve thousand, two hundred thirteen".