420224431 has 4 divisors (see below), whose sum is σ = 458426664. Its totient is φ = 382022200.

The previous prime is 420224381. The next prime is 420224449. The reversal of 420224431 is 134422024.

It is a happy number.

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 420224431 - 2¹⁹ = 419700143 is a prime.

It is a super-2 number, since 2×420224431² = 353177144818547522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420224131) 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, 19101100 + ... + 19101121.

It is an arithmetic number, because the mean of its divisors is an integer number (114606666).

Almost surely, 2^420224431 is an apocalyptic number.

420224431 is a deficient number, since it is larger than the sum of its proper divisors (38202233).

420224431 is a wasteful number, since it uses less digits than its factorization.

420224431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38202232.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 420224431 is about 20499.3763563675. The cubic root of 420224431 is about 749.0206066453.

Adding to 420224431 its reverse (134422024), we get a palindrome (554646455).

The spelling of 420224431 in words is "four hundred twenty million, two hundred twenty-four thousand, four hundred thirty-one".