221844601 has 4 divisors (see below), whose sum is σ = 242012304. Its totient is φ = 201676900.

The previous prime is 221844599. The next prime is 221844607. The reversal of 221844601 is 106448122.

221844601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221844601 - 2¹ = 221844599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221844601.

It is not an unprimeable number, because it can be changed into a prime (221844607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10083835 + ... + 10083856.

It is an arithmetic number, because the mean of its divisors is an integer number (60503076).

Almost surely, 2^221844601 is an apocalyptic number.

It is an amenable number.

221844601 is a deficient number, since it is larger than the sum of its proper divisors (20167703).

221844601 is a wasteful number, since it uses less digits than its factorization.

221844601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20167702.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 221844601 is about 14894.4486638479. The cubic root of 221844601 is about 605.3635781061.

The spelling of 221844601 in words is "two hundred twenty-one million, eight hundred forty-four thousand, six hundred one".