420331243 has 8 divisors (see below), whose sum is σ = 442642320. Its totient is φ = 398039040.

The previous prime is 420331237. The next prime is 420331253. The reversal of 420331243 is 342133024.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420331243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420331213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82671 + ... + 87607.

It is an arithmetic number, because the mean of its divisors is an integer number (55330290).

Almost surely, 2^420331243 is an apocalyptic number.

420331243 is a deficient number, since it is larger than the sum of its proper divisors (22311077).

420331243 is a wasteful number, since it uses less digits than its factorization.

420331243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9437.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 420331243 is about 20501.9814408266. The cubic root of 420331243 is about 749.0840629047.

Adding to 420331243 its reverse (342133024), we get a palindrome (762464267).

The spelling of 420331243 in words is "four hundred twenty million, three hundred thirty-one thousand, two hundred forty-three".