451232220 has 48 divisors (see below), whose sum is σ = 1266763680. Its totient is φ = 120013056.

The previous prime is 451232213. The next prime is 451232231. The reversal of 451232220 is 22232154.

It is a super-2 number, since 2×451232220² = 407221032732256800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13674 + ... + 33006.

It is an arithmetic number, because the mean of its divisors is an integer number (26390910).

Almost surely, 2^451232220 is an apocalyptic number.

It is an amenable number.

451232220 is an abundant number, since it is smaller than the sum of its proper divisors (815531460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

451232220 is a wasteful number, since it uses less digits than its factorization.

451232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19734 (or 19732 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 451232220 is about 21242.2272843504. The cubic root of 451232220 is about 767.0082481249.

Adding to 451232220 its reverse (22232154), we get a palindrome (473464374).

The spelling of 451232220 in words is "four hundred fifty-one million, two hundred thirty-two thousand, two hundred twenty".