455430221 has 4 divisors (see below), whose sum is σ = 482220252. Its totient is φ = 428640192.

The previous prime is 455430203. The next prime is 455430233. The reversal of 455430221 is 122034554.

It is a happy number.

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 407474596 + 47955625 = 20186^2 + 6925^2 .

It is a cyclic number.

It is not a de Polignac number, because 455430221 - 2¹⁴ = 455413837 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 (455430121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13394990 + ... + 13395023.

It is an arithmetic number, because the mean of its divisors is an integer number (120555063).

Almost surely, 2^455430221 is an apocalyptic number.

It is an amenable number.

455430221 is a deficient number, since it is larger than the sum of its proper divisors (26790031).

455430221 is a wasteful number, since it uses less digits than its factorization.

455430221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26790030.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 455430221 is about 21340.8111607783. The cubic root of 455430221 is about 769.3795085549.

Adding to 455430221 its reverse (122034554), we get a palindrome (577464775).

The spelling of 455430221 in words is "four hundred fifty-five million, four hundred thirty thousand, two hundred twenty-one".