431213 has 2 divisors, whose sum is σ = 431214. Its totient is φ = 431212.

The previous prime is 431203. The next prime is 431219. The reversal of 431213 is 312134.

431213 is nontrivially palindromic in base 15.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316969 + 114244 = 563^2 + 338^2 .

It is a cyclic number.

It is not a de Polignac number, because 431213 - 2⁸ = 430957 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215606 + 215607.

It is an arithmetic number, because the mean of its divisors is an integer number (215607).

2⁴³¹²¹³ is an apocalyptic number.

It is an amenable number.

431213 is a deficient number, since it is larger than the sum of its proper divisors (1).

431213 is an equidigital number, since it uses as much as digits as its factorization.

431213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 14.

The square root of 431213 is about 656.6681049054. The cubic root of 431213 is about 75.5493296324.

Adding to 431213 its reverse (312134), we get a palindrome (743347).

The spelling of 431213 in words is "four hundred thirty-one thousand, two hundred thirteen".