421924231 has 2 divisors, whose sum is σ = 421924232. Its totient is φ = 421924230.

The previous prime is 421924211. The next prime is 421924249. The reversal of 421924231 is 132429124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421924231 - 2⁵ = 421924199 is a prime.

It is a super-2 number, since 2×421924231² = 356040113409882722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421924231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421924211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210962115 + 210962116.

It is an arithmetic number, because the mean of its divisors is an integer number (210962116).

Almost surely, 2^421924231 is an apocalyptic number.

421924231 is a deficient number, since it is larger than the sum of its proper divisors (1).

421924231 is an equidigital number, since it uses as much as digits as its factorization.

421924231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 421924231 is about 20540.7943127816. The cubic root of 421924231 is about 750.0291727912.

The spelling of 421924231 in words is "four hundred twenty-one million, nine hundred twenty-four thousand, two hundred thirty-one".