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22222001 = 195772027
BaseRepresentation
bin101010011000…
…1010010110001
31112210222212002
41110301102301
521142101001
62112143345
7356612114
oct124612261
945728762
1022222001
11115a879a
127537b55
1347b0919
142d4657b
151e3e46b
hex15314b1

22222001 has 8 divisors (see below), whose sum is σ = 23443680. Its totient is φ = 21005568.

The previous prime is 22221977. The next prime is 22222049. The reversal of 22222001 is 10022222.

Adding to 22222001 its reverse (10022222), we get a palindrome (32244223).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22222001 - 222 = 18027697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22222051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9950 + ... + 11976.

It is an arithmetic number, because the mean of its divisors is an integer number (2930460).

Almost surely, 222222001 is an apocalyptic number.

It is an amenable number.

22222001 is a deficient number, since it is larger than the sum of its proper divisors (1221679).

22222001 is a wasteful number, since it uses less digits than its factorization.

22222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623.

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

The square root of 22222001 is about 4714.0217436919. The cubic root of 22222001 is about 281.1432888339.

The spelling of 22222001 in words is "twenty-two million, two hundred twenty-two thousand, one".

Divisors: 1 19 577 2027 10963 38513 1169579 22222001