451224421 has 4 divisors (see below), whose sum is σ = 477767052. Its totient is φ = 424681792.

The previous prime is 451224401. The next prime is 451224443. The reversal of 451224421 is 124422154.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 295324225 + 155900196 = 17185^2 + 12486^2 .

It is a cyclic number.

It is not a de Polignac number, because 451224421 - 2⁹ = 451223909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451224401) 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, 13271290 + ... + 13271323.

It is an arithmetic number, because the mean of its divisors is an integer number (119441763).

Almost surely, 2^451224421 is an apocalyptic number.

It is an amenable number.

451224421 is a deficient number, since it is larger than the sum of its proper divisors (26542631).

451224421 is a wasteful number, since it uses less digits than its factorization.

451224421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26542630.

The product of its digits is 2560, while the sum is 25.

The square root of 451224421 is about 21242.0437105284. The cubic root of 451224421 is about 767.0038291646.

Adding to 451224421 its reverse (124422154), we get a palindrome (575646575).

The spelling of 451224421 in words is "four hundred fifty-one million, two hundred twenty-four thousand, four hundred twenty-one".