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201220213 = 1091846057
BaseRepresentation
bin10111111111001…
…10000001110101
3112000122001020111
423333212001311
5403003021323
631544503021
74662225565
oct1377460165
9460561214
10201220213
11a36467a7
125747aa71
13328c381c
141ca1cda5
15129eac0d
hexbfe6075

201220213 has 4 divisors (see below), whose sum is σ = 203066380. Its totient is φ = 199374048.

The previous prime is 201220199. The next prime is 201220223. The reversal of 201220213 is 312022102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108618084 + 92602129 = 10422^2 + 9623^2 .

It is a cyclic number.

It is not a de Polignac number, because 201220213 - 213 = 201212021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201220193 and 201220202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 922920 + ... + 923137.

It is an arithmetic number, because the mean of its divisors is an integer number (50766595).

Almost surely, 2201220213 is an apocalyptic number.

It is an amenable number.

201220213 is a deficient number, since it is larger than the sum of its proper divisors (1846167).

201220213 is a wasteful number, since it uses less digits than its factorization.

201220213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846166.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 201220213 is about 14185.2110664593. The cubic root of 201220213 is about 585.9904452775.

Adding to 201220213 its reverse (312022102), we get a palindrome (513242315).

The spelling of 201220213 in words is "two hundred one million, two hundred twenty thousand, two hundred thirteen".

Divisors: 1 109 1846057 201220213