420214231 has 2 divisors, whose sum is σ = 420214232. Its totient is φ = 420214230.

The previous prime is 420214229. The next prime is 420214253. The reversal of 420214231 is 132412024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420214231 - 2¹ = 420214229 is a prime.

It is a super-2 number, since 2×420214231² = 353159999869842722, which contains 22 as substring.

Together with 420214229, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 420214199 and 420214208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420214271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210107115 + 210107116.

It is an arithmetic number, because the mean of its divisors is an integer number (210107116).

Almost surely, 2^420214231 is an apocalyptic number.

420214231 is a deficient number, since it is larger than the sum of its proper divisors (1).

420214231 is an equidigital number, since it uses as much as digits as its factorization.

420214231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 420214231 is about 20499.1275668015. The cubic root of 420214231 is about 749.0145463345.

Adding to 420214231 its reverse (132412024), we get a palindrome (552626255).

The spelling of 420214231 in words is "four hundred twenty million, two hundred fourteen thousand, two hundred thirty-one".