420412231 has 2 divisors, whose sum is σ = 420412232. Its totient is φ = 420412230.

The previous prime is 420412211. The next prime is 420412253. The reversal of 420412231 is 132214024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420412231 - 2¹⁹ = 419887943 is a prime.

It is a super-2 number, since 2×420412231² = 353492887948794722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 420412199 and 420412208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420412211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210206115 + 210206116.

It is an arithmetic number, because the mean of its divisors is an integer number (210206116).

Almost surely, 2^420412231 is an apocalyptic number.

420412231 is a deficient number, since it is larger than the sum of its proper divisors (1).

420412231 is an equidigital number, since it uses as much as digits as its factorization.

420412231 is an odious number, because the sum of its binary digits is odd.

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

The square root of 420412231 is about 20503.9564718617. The cubic root of 420412231 is about 749.1321701417.

Adding to 420412231 its reverse (132214024), we get a palindrome (552626255).

The spelling of 420412231 in words is "four hundred twenty million, four hundred twelve thousand, two hundred thirty-one".