420240331 has 4 divisors (see below), whose sum is σ = 480274672. Its totient is φ = 360205992.

The previous prime is 420240329. The next prime is 420240343. The reversal of 420240331 is 133042024.

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 420240331 - 2¹ = 420240329 is a prime.

It is a super-2 number, since 2×420240331² = 353203871597979122, 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 = 420240299 and 420240308.

It is not an unprimeable number, because it can be changed into a prime (420240361) 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, 30017160 + ... + 30017173.

It is an arithmetic number, because the mean of its divisors is an integer number (120068668).

Almost surely, 2^420240331 is an apocalyptic number.

420240331 is a deficient number, since it is larger than the sum of its proper divisors (60034341).

420240331 is an equidigital number, since it uses as much as digits as its factorization.

420240331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60034340.

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

The square root of 420240331 is about 20499.7641693752. The cubic root of 420240331 is about 749.0300534048.

Adding to 420240331 its reverse (133042024), we get a palindrome (553282355).

The spelling of 420240331 in words is "four hundred twenty million, two hundred forty thousand, three hundred thirty-one".