454521220 has 24 divisors (see below), whose sum is σ = 965223000. Its totient is φ = 179764992.

The previous prime is 454521217. The next prime is 454521247. The reversal of 454521220 is 22125454.

It can be written as a sum of positive squares in 4 ways, for example, as 109453444 + 345067776 = 10462^2 + 18576^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125895 + ... + 129454.

It is an arithmetic number, because the mean of its divisors is an integer number (40217625).

Almost surely, 2^454521220 is an apocalyptic number.

It is an amenable number.

454521220 is an abundant number, since it is smaller than the sum of its proper divisors (510701780).

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

454521220 is a wasteful number, since it uses less digits than its factorization.

454521220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255447 (or 255445 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 454521220 is about 21319.5032775156. The cubic root of 454521220 is about 768.8672950334.

Adding to 454521220 its reverse (22125454), we get a palindrome (476646674).

The spelling of 454521220 in words is "four hundred fifty-four million, five hundred twenty-one thousand, two hundred twenty".