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211201 = 1271663
BaseRepresentation
bin110011100100000001
3101201201021
4303210001
523224301
64305441
71536514
oct634401
9351637
10211201
11134751
12a2281
1375193
1456d7b
15428a1
hex33901

211201 has 4 divisors (see below), whose sum is σ = 212992. Its totient is φ = 209412.

The previous prime is 211199. The next prime is 211213. The reversal of 211201 is 102112.

Adding to 211201 its reverse (102112), we get a palindrome (313313).

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 211201 - 21 = 211199 is a prime.

It is a Duffinian number.

211201 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (211231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705 + ... + 958.

It is an arithmetic number, because the mean of its divisors is an integer number (53248).

2211201 is an apocalyptic number.

It is an amenable number.

211201 is a deficient number, since it is larger than the sum of its proper divisors (1791).

211201 is a wasteful number, since it uses less digits than its factorization.

211201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 211201 is about 459.5660997071. The cubic root of 211201 is about 59.5523161083.

The spelling of 211201 in words is "two hundred eleven thousand, two hundred one", and thus it is an iban number.

Divisors: 1 127 1663 211201