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200102221 = 1118191111
BaseRepresentation
bin10111110110101…
…01000101001101
3111221112020122101
423323111011031
5402211232341
631504515101
74646561254
oct1373250515
9457466571
10200102221
11a2a52840
125701ba91
13325c19a7
141c80b79b
1512879831
hexbed514d

200102221 has 4 divisors (see below), whose sum is σ = 218293344. Its totient is φ = 181911100.

The previous prime is 200102209. The next prime is 200102237. The reversal of 200102221 is 122201002.

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 200102221 - 215 = 200069453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200102198 and 200102207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200102251) 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, 9095545 + ... + 9095566.

It is an arithmetic number, because the mean of its divisors is an integer number (54573336).

Almost surely, 2200102221 is an apocalyptic number.

It is an amenable number.

200102221 is a deficient number, since it is larger than the sum of its proper divisors (18191123).

200102221 is a wasteful number, since it uses less digits than its factorization.

200102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18191122.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 200102221 is about 14145.7492201721. The cubic root of 200102221 is about 584.9031626790.

Adding to 200102221 its reverse (122201002), we get a palindrome (322303223).

The spelling of 200102221 in words is "two hundred million, one hundred two thousand, two hundred twenty-one".

Divisors: 1 11 18191111 200102221