451105220 has 48 divisors (see below), whose sum is σ = 1006420800. Its totient is φ = 169361280.

The previous prime is 451105159. The next prime is 451105231. The reversal of 451105220 is 22501154.

It is a super-2 number, since 2×451105220² = 406991839022496800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 451105192 and 451105201.

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, 35975 + ... + 46865.

It is an arithmetic number, because the mean of its divisors is an integer number (20967100).

Almost surely, 2^451105220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 451105220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (503210400).

451105220 is an abundant number, since it is smaller than the sum of its proper divisors (555315580).

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

451105220 is a wasteful number, since it uses less digits than its factorization.

451105220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11028 (or 11026 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 451105220 is about 21239.2377452676. The cubic root of 451105220 is about 766.9362828238.

Adding to 451105220 its reverse (22501154), we get a palindrome (473606374).

The spelling of 451105220 in words is "four hundred fifty-one million, one hundred five thousand, two hundred twenty".