420043231 has 4 divisors (see below), whose sum is σ = 421605000. Its totient is φ = 418481464.

The previous prime is 420043223. The next prime is 420043291. The reversal of 420043231 is 132340024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420043231 - 2³ = 420043223 is a prime.

It is a super-2 number, since 2×420043231² = 352872631817838722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420043199 and 420043208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420043291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 780481 + ... + 781018.

It is an arithmetic number, because the mean of its divisors is an integer number (105401250).

Almost surely, 2^420043231 is an apocalyptic number.

420043231 is a deficient number, since it is larger than the sum of its proper divisors (1561769).

420043231 is a wasteful number, since it uses less digits than its factorization.

420043231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561768.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 420043231 is about 20494.9562331809. The cubic root of 420043231 is about 748.9129323992.

Adding to 420043231 its reverse (132340024), we get a palindrome (552383255).

The spelling of 420043231 in words is "four hundred twenty million, forty-three thousand, two hundred thirty-one".