221324453 has 8 divisors (see below), whose sum is σ = 253078080. Its totient is φ = 189604800.

The previous prime is 221324429. The next prime is 221324489. The reversal of 221324453 is 354423122.

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

It is not a de Polignac number, because 221324453 - 2¹² = 221320357 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 (221324353) 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, 7478 + ... + 22328.

It is an arithmetic number, because the mean of its divisors is an integer number (31634760).

Almost surely, 2^221324453 is an apocalyptic number.

It is an amenable number.

221324453 is a deficient number, since it is larger than the sum of its proper divisors (31753627).

221324453 is a wasteful number, since it uses less digits than its factorization.

221324453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16987.

The product of its digits is 5760, while the sum is 26.

The square root of 221324453 is about 14876.9772803483. The cubic root of 221324453 is about 604.8900858995.

Adding to 221324453 its reverse (354423122), we get a palindrome (575747575).

The spelling of 221324453 in words is "two hundred twenty-one million, three hundred twenty-four thousand, four hundred fifty-three".