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172201 = 237487
BaseRepresentation
bin101010000010101001
322202012211
4222002221
521002301
63405121
71315021
oct520251
9282184
10172201
11108417
12837a1
13604c3
1446a81
1536051
hex2a0a9

172201 has 4 divisors (see below), whose sum is σ = 179712. Its totient is φ = 164692.

The previous prime is 172199. The next prime is 172213. The reversal of 172201 is 102271.

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: 102271 = 137867.

It is a cyclic number.

It is not a de Polignac number, because 172201 - 21 = 172199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172001) 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, 3721 + ... + 3766.

It is an arithmetic number, because the mean of its divisors is an integer number (44928).

2172201 is an apocalyptic number.

It is an amenable number.

172201 is a deficient number, since it is larger than the sum of its proper divisors (7511).

172201 is an equidigital number, since it uses as much as digits as its factorization.

172201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7510.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 172201 is about 414.9710833299. The cubic root of 172201 is about 55.6346324269.

Adding to 172201 its reverse (102271), we get a palindrome (274472).

It can be divided in two parts, 172 and 201, that added together give a palindrome (373).

The spelling of 172201 in words is "one hundred seventy-two thousand, two hundred one", and thus it is an iban number.

Divisors: 1 23 7487 172201