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2001022213 = 17117707189
BaseRepresentation
bin111011101000101…
…0010110100000101
312011110021110102211
41313101102310011
513044230202323
6530320503421
7100405260001
oct16721226405
95143243384
102001022213
11937585673
1247a17ab71
1325b744718
1414da83701
15baa1570d
hex77452d05

2001022213 has 4 divisors (see below), whose sum is σ = 2118729420. Its totient is φ = 1883315008.

The previous prime is 2001022211. The next prime is 2001022217. The reversal of 2001022213 is 3122201002.

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 1169161249 + 831860964 = 34193^2 + 28842^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001022213 - 21 = 2001022211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001022193 and 2001022202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001022211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58853578 + ... + 58853611.

It is an arithmetic number, because the mean of its divisors is an integer number (529682355).

Almost surely, 22001022213 is an apocalyptic number.

It is an amenable number.

2001022213 is a deficient number, since it is larger than the sum of its proper divisors (117707207).

2001022213 is a wasteful number, since it uses less digits than its factorization.

2001022213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117707206.

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

The square root of 2001022213 is about 44732.7867788270. The cubic root of 2001022213 is about 1260.1356646147.

Adding to 2001022213 its reverse (3122201002), we get a palindrome (5123223215).

The spelling of 2001022213 in words is "two billion, one million, twenty-two thousand, two hundred thirteen".

Divisors: 1 17 117707189 2001022213