431132213 has 4 divisors (see below), whose sum is σ = 432603948. Its totient is φ = 429660480.

The previous prime is 431132209. The next prime is 431132231. The reversal of 431132213 is 312231134.

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 202578289 + 228553924 = 14233^2 + 15118^2 .

It is a cyclic number.

It is not a de Polignac number, because 431132213 - 2² = 431132209 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 (431132243) 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, 735428 + ... + 736013.

It is an arithmetic number, because the mean of its divisors is an integer number (108150987).

Almost surely, 2^431132213 is an apocalyptic number.

It is an amenable number.

431132213 is a deficient number, since it is larger than the sum of its proper divisors (1471735).

431132213 is a wasteful number, since it uses less digits than its factorization.

431132213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471734.

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

The square root of 431132213 is about 20763.7234859261. The cubic root of 431132213 is about 755.4461132626.

Adding to 431132213 its reverse (312231134), we get a palindrome (743363347).

The spelling of 431132213 in words is "four hundred thirty-one million, one hundred thirty-two thousand, two hundred thirteen".