455421221 has 8 divisors (see below), whose sum is σ = 460504704. Its totient is φ = 450349200.

The previous prime is 455421199. The next prime is 455421223. The reversal of 455421221 is 122124554.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 455421221 - 2⁶ = 455421157 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 (455421223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95336 + ... + 99998.

It is an arithmetic number, because the mean of its divisors is an integer number (57563088).

Almost surely, 2^455421221 is an apocalyptic number.

It is an amenable number.

455421221 is a deficient number, since it is larger than the sum of its proper divisors (5083483).

455421221 is a wasteful number, since it uses less digits than its factorization.

455421221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5731.

The product of its digits is 3200, while the sum is 26.

The square root of 455421221 is about 21340.6002961491. The cubic root of 455421221 is about 769.3744404817.

Adding to 455421221 its reverse (122124554), we get a palindrome (577545775).

The spelling of 455421221 in words is "four hundred fifty-five million, four hundred twenty-one thousand, two hundred twenty-one".