420236213 has 2 divisors, whose sum is σ = 420236214. Its totient is φ = 420236212.

The previous prime is 420236161. The next prime is 420236249. The reversal of 420236213 is 312632024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292478404 + 127757809 = 17102^2 + 11303^2 .

It is a cyclic number.

It is not a de Polignac number, because 420236213 - 2⁸ = 420235957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420236273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210118106 + 210118107.

It is an arithmetic number, because the mean of its divisors is an integer number (210118107).

Almost surely, 2^420236213 is an apocalyptic number.

It is an amenable number.

420236213 is a deficient number, since it is larger than the sum of its proper divisors (1).

420236213 is an equidigital number, since it uses as much as digits as its factorization.

420236213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 420236213 is about 20499.6637289493. The cubic root of 420236213 is about 749.0276067764.

Adding to 420236213 its reverse (312632024), we get a palindrome (732868237).

The spelling of 420236213 in words is "four hundred twenty million, two hundred thirty-six thousand, two hundred thirteen".