221450453 has 24 divisors (see below), whose sum is σ = 279947520. Its totient is φ = 174000960.

The previous prime is 221450447. The next prime is 221450461. The reversal of 221450453 is 354054122.

It is a happy number.

It is not a de Polignac number, because 221450453 - 2²⁰ = 220401877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221450153) 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 23 ways as a sum of consecutive naturals, for example, 25025 + ... + 32697.

It is an arithmetic number, because the mean of its divisors is an integer number (11664480).

Almost surely, 2^221450453 is an apocalyptic number.

It is an amenable number.

221450453 is a deficient number, since it is larger than the sum of its proper divisors (58497067).

221450453 is a wasteful number, since it uses less digits than its factorization.

221450453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7737 (or 7730 counting only the distinct ones).

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

The square root of 221450453 is about 14881.2114090218. The cubic root of 221450453 is about 605.0048520887.

The spelling of 221450453 in words is "two hundred twenty-one million, four hundred fifty thousand, four hundred fifty-three".