221036453 has 8 divisors (see below), whose sum is σ = 247012416. Its totient is φ = 196040800.

The previous prime is 221036437. The next prime is 221036461. The reversal of 221036453 is 354630122.

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 221036453 - 2⁴ = 221036437 is a prime.

It is a super-2 number, since 2×221036453² = 97714227109642418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221036423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244601 + ... + 245502.

It is an arithmetic number, because the mean of its divisors is an integer number (30876552).

Almost surely, 2^221036453 is an apocalyptic number.

It is an amenable number.

221036453 is a deficient number, since it is larger than the sum of its proper divisors (25975963).

221036453 is a wasteful number, since it uses less digits than its factorization.

221036453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490155.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 221036453 is about 14867.2947438329. The cubic root of 221036453 is about 604.6275995206.

Adding to 221036453 its reverse (354630122), we get a palindrome (575666575).

The spelling of 221036453 in words is "two hundred twenty-one million, thirty-six thousand, four hundred fifty-three".