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BaseRepresentation
bin1000011001101001101101
311010212212202
420121221231
51030432341
6115111245
724501320
oct10315155
94125782
102202221
11127461a
128a2525
135c14b8
144147b7
152d779b
hex219a6d

2202221 has 4 divisors (see below), whose sum is σ = 2516832. Its totient is φ = 1887612.

The previous prime is 2202169. The next prime is 2202253. The reversal of 2202221 is 1222022.

2202221 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, and also an emirpimes, since its reverse is a distinct semiprime: 1222022 = 2611011.

It is a cyclic number.

It is not a de Polignac number, because 2202221 - 210 = 2201197 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 (2202121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157295 + ... + 157308.

It is an arithmetic number, because the mean of its divisors is an integer number (629208).

22202221 is an apocalyptic number.

It is an amenable number.

2202221 is a deficient number, since it is larger than the sum of its proper divisors (314611).

2202221 is an equidigital number, since it uses as much as digits as its factorization.

2202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314610.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 2202221 is about 1483.9882075003. The cubic root of 2202221 is about 130.1028968380.

Adding to 2202221 its reverse (1222022), we get a palindrome (3424243).

The spelling of 2202221 in words is "two million, two hundred two thousand, two hundred twenty-one".

Divisors: 1 7 314603 2202221