221144797 has 8 divisors (see below), whose sum is σ = 224104320. Its totient is φ = 218196000.

The previous prime is 221144761. The next prime is 221144801. The reversal of 221144797 is 797441122.

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 221144797 - 2¹⁵ = 221112029 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 (221544797) 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, 44172 + ... + 48922.

It is an arithmetic number, because the mean of its divisors is an integer number (28013040).

Almost surely, 2^221144797 is an apocalyptic number.

It is an amenable number.

221144797 is a deficient number, since it is larger than the sum of its proper divisors (2959523).

221144797 is an equidigital number, since it uses as much as digits as its factorization.

221144797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5363.

The product of its digits is 28224, while the sum is 37.

The square root of 221144797 is about 14870.9380000052. The cubic root of 221144797 is about 604.7263721763.

The spelling of 221144797 in words is "two hundred twenty-one million, one hundred forty-four thousand, seven hundred ninety-seven".