420328231 has 2 divisors, whose sum is σ = 420328232. Its totient is φ = 420328230.

The previous prime is 420328229. The next prime is 420328253. The reversal of 420328231 is 132823024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420328231 - 2¹ = 420328229 is a prime.

It is a super-2 number, since 2×420328231² = 353351643551178722, which contains 22 as substring.

Together with 420328229, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 420328196 and 420328205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420328261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210164115 + 210164116.

It is an arithmetic number, because the mean of its divisors is an integer number (210164116).

Almost surely, 2^420328231 is an apocalyptic number.

420328231 is a deficient number, since it is larger than the sum of its proper divisors (1).

420328231 is an equidigital number, since it uses as much as digits as its factorization.

420328231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 420328231 is about 20501.9079843804. The cubic root of 420328231 is about 749.0822736440.

The spelling of 420328231 in words is "four hundred twenty million, three hundred twenty-eight thousand, two hundred thirty-one".