454243221 has 20 divisors (see below), whose sum is σ = 684799500. Its totient is φ = 300044736.

The previous prime is 454243219. The next prime is 454243253. The reversal of 454243221 is 122342454.

It can be written as a sum of positive squares in 2 ways, for example, as 228342321 + 225900900 = 15111^2 + 15030^2 .

It is not a de Polignac number, because 454243221 - 2¹ = 454243219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (454243291) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16896 + ... + 34553.

It is an arithmetic number, because the mean of its divisors is an integer number (34239975).

Almost surely, 2^454243221 is an apocalyptic number.

It is an amenable number.

454243221 is a deficient number, since it is larger than the sum of its proper divisors (230556279).

454243221 is a wasteful number, since it uses less digits than its factorization.

454243221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51570 (or 51561 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 454243221 is about 21312.9824520174. The cubic root of 454243221 is about 768.7105088577.

Adding to 454243221 its reverse (122342454), we get a palindrome (576585675).

It can be divided in two parts, 4 and 54243221, that added together give a square (54243225 = 7365²).

The spelling of 454243221 in words is "four hundred fifty-four million, two hundred forty-three thousand, two hundred twenty-one".