420213331 has 4 divisors (see below), whose sum is σ = 425969752. Its totient is φ = 414456912.

The previous prime is 420213317. The next prime is 420213337. The reversal of 420213331 is 133312024.

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 420213331 - 2¹¹ = 420211283 is a prime.

It is a super-2 number, since 2×420213331² = 353158487100231122, 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 = 420213299 and 420213308.

It is not an unprimeable number, because it can be changed into a prime (420213337) 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, 2878101 + ... + 2878246.

It is an arithmetic number, because the mean of its divisors is an integer number (106492438).

Almost surely, 2^420213331 is an apocalyptic number.

420213331 is a deficient number, since it is larger than the sum of its proper divisors (5756421).

420213331 is an equidigital number, since it uses as much as digits as its factorization.

420213331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5756420.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 420213331 is about 20499.1056146360. The cubic root of 420213331 is about 749.0140115964.

Adding to 420213331 its reverse (133312024), we get a palindrome (553525355).

The spelling of 420213331 in words is "four hundred twenty million, two hundred thirteen thousand, three hundred thirty-one".