420241231 has 2 divisors, whose sum is σ = 420241232. Its totient is φ = 420241230.

The previous prime is 420241229. The next prime is 420241253. The reversal of 420241231 is 132142024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420241231 - 2¹ = 420241229 is a prime.

It is a super-2 number, since 2×420241231² = 353205384464790722, which contains 22 as substring.

Together with 420241229, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 420241199 and 420241208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420241271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210120615 + 210120616.

It is an arithmetic number, because the mean of its divisors is an integer number (210120616).

Almost surely, 2^420241231 is an apocalyptic number.

420241231 is a deficient number, since it is larger than the sum of its proper divisors (1).

420241231 is an equidigital number, since it uses as much as digits as its factorization.

420241231 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 420241231 is about 20499.7861208355. The cubic root of 420241231 is about 749.0305881199.

Adding to 420241231 its reverse (132142024), we get a palindrome (552383255).

The spelling of 420241231 in words is "four hundred twenty million, two hundred forty-one thousand, two hundred thirty-one".