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2022221 = 12715923
BaseRepresentation
bin111101101101101001101
310210201222002
413231231031
51004202341
6111202045
723121455
oct7555515
93721862
102022221
111161363
12816325
1355a5a6
143a8d65
1529e29b
hex1edb4d

2022221 has 4 divisors (see below), whose sum is σ = 2038272. Its totient is φ = 2006172.

The previous prime is 2022217. The next prime is 2022233. The reversal of 2022221 is 1222202.

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: 1222202 = 2611101.

It is a cyclic number.

It is not a de Polignac number, because 2022221 - 22 = 2022217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2022271) 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, 7835 + ... + 8088.

It is an arithmetic number, because the mean of its divisors is an integer number (509568).

22022221 is an apocalyptic number.

It is an amenable number.

2022221 is a deficient number, since it is larger than the sum of its proper divisors (16051).

2022221 is a wasteful number, since it uses less digits than its factorization.

2022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16050.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 2022221 is about 1422.0481707734. The cubic root of 2022221 is about 126.4569992420.

Adding to 2022221 its reverse (1222202), we get a palindrome (3244423).

The spelling of 2022221 in words is "two million, twenty-two thousand, two hundred twenty-one".

Divisors: 1 127 15923 2022221