420224033 has 4 divisors (see below), whose sum is σ = 420268308. Its totient is φ = 420179760.

The previous prime is 420224009. The next prime is 420224069. The reversal of 420224033 is 330422024.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 116488849 + 303735184 = 10793^2 + 17428^2 .

It is a cyclic number.

It is not a de Polignac number, because 420224033 - 2¹⁰ = 420223009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420223996 and 420224014.

It is not an unprimeable number, because it can be changed into a prime (420227033) 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, 1466 + ... + 29027.

It is an arithmetic number, because the mean of its divisors is an integer number (105067077).

Almost surely, 2^420224033 is an apocalyptic number.

It is an amenable number.

420224033 is a deficient number, since it is larger than the sum of its proper divisors (44275).

420224033 is a wasteful number, since it uses less digits than its factorization.

420224033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44274.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 420224033 is about 20499.3666487528. The cubic root of 420224033 is about 749.0203701762.

Adding to 420224033 its reverse (330422024), we get a palindrome (750646057).

The spelling of 420224033 in words is "four hundred twenty million, two hundred twenty-four thousand, thirty-three".