421620233 has 4 divisors (see below), whose sum is σ = 422030208. Its totient is φ = 421210260.

The previous prime is 421620229. The next prime is 421620239. The reversal of 421620233 is 332026124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 421620233 - 2² = 421620229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421620199 and 421620208.

It is not an unprimeable number, because it can be changed into a prime (421620239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203441 + ... + 205502.

It is an arithmetic number, because the mean of its divisors is an integer number (105507552).

Almost surely, 2^421620233 is an apocalyptic number.

It is an amenable number.

421620233 is a deficient number, since it is larger than the sum of its proper divisors (409975).

421620233 is a wasteful number, since it uses less digits than its factorization.

421620233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409974.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 421620233 is about 20533.3931195017. The cubic root of 421620233 is about 749.8489965623.

Adding to 421620233 its reverse (332026124), we get a palindrome (753646357).

The spelling of 421620233 in words is "four hundred twenty-one million, six hundred twenty thousand, two hundred thirty-three".