221001313 has 8 divisors (see below), whose sum is σ = 238883456. Its totient is φ = 203245200.

The previous prime is 221001311. The next prime is 221001337. The reversal of 221001313 is 313100122.

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 221001313 - 2¹ = 221001311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221001293 and 221001302.

It is not an unprimeable number, because it can be changed into a prime (221001311) 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 7 ways as a sum of consecutive naturals, for example, 27843 + ... + 34888.

It is an arithmetic number, because the mean of its divisors is an integer number (29860432).

Almost surely, 2^221001313 is an apocalyptic number.

It is an amenable number.

221001313 is a deficient number, since it is larger than the sum of its proper divisors (17882143).

221001313 is a wasteful number, since it uses less digits than its factorization.

221001313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63015.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 221001313 is about 14866.1129082218. The cubic root of 221001313 is about 604.5955569328.

Adding to 221001313 its reverse (313100122), we get a palindrome (534101435).

The spelling of 221001313 in words is "two hundred twenty-one million, one thousand, three hundred thirteen".