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21049219 is a prime number
BaseRepresentation
bin101000001001…
…0111110000011
31110121102002201
41100102332003
520342033334
62031054031
7343625662
oct120227603
943542081
1021049219
1110977654
127071317
13448cb79
142b1cdd9
151cabc14
hex1412f83

21049219 has 2 divisors, whose sum is σ = 21049220. Its totient is φ = 21049218.

The previous prime is 21049201. The next prime is 21049241. The reversal of 21049219 is 91294012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21049219 - 29 = 21048707 is a prime.

It is a super-2 number, since 2×210492192 = 886139241019922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21049289) 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 as a sum of consecutive naturals, namely, 10524609 + 10524610.

It is an arithmetic number, because the mean of its divisors is an integer number (10524610).

Almost surely, 221049219 is an apocalyptic number.

21049219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21049219 is an equidigital number, since it uses as much as digits as its factorization.

21049219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 21049219 is about 4587.9427851707. The cubic root of 21049219 is about 276.1077915100.

The spelling of 21049219 in words is "twenty-one million, forty-nine thousand, two hundred nineteen".