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21164422 = 217622483
BaseRepresentation
bin101000010111…
…1000110000110
31110211021010111
41100233012012
520404230142
62033343234
7344615566
oct120570606
943737114
1021164422
1110a46164
127107b1a
134500436
142b4cda6
151cd0e17
hex142f186

21164422 has 8 divisors (see below), whose sum is σ = 33614136. Its totient is φ = 9959712.

The previous prime is 21164401. The next prime is 21164431. The reversal of 21164422 is 22446112.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21164393 and 21164402.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 311208 + ... + 311275.

It is an arithmetic number, because the mean of its divisors is an integer number (4201767).

Almost surely, 221164422 is an apocalyptic number.

21164422 is a deficient number, since it is larger than the sum of its proper divisors (12449714).

21164422 is a wasteful number, since it uses less digits than its factorization.

21164422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622502.

The product of its digits is 768, while the sum is 22.

The square root of 21164422 is about 4600.4806270650. The cubic root of 21164422 is about 276.6105907221.

The spelling of 21164422 in words is "twenty-one million, one hundred sixty-four thousand, four hundred twenty-two".

Divisors: 1 2 17 34 622483 1244966 10582211 21164422