221001359 has 4 divisors (see below), whose sum is σ = 221031720. Its totient is φ = 220971000.

The previous prime is 221001349. The next prime is 221001367. The reversal of 221001359 is 953100122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221001359 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 (221001349) 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, 2984 + ... + 21234.

It is an arithmetic number, because the mean of its divisors is an integer number (55257930).

Almost surely, 2^221001359 is an apocalyptic number.

221001359 is a deficient number, since it is larger than the sum of its proper divisors (30361).

221001359 is a wasteful number, since it uses less digits than its factorization.

221001359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30360.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 221001359 is about 14866.1144553646. The cubic root of 221001359 is about 604.5955988804.

The spelling of 221001359 in words is "two hundred twenty-one million, one thousand, three hundred fifty-nine".