Base | Representation |
---|---|
bin | 101000011011… |
… | …0111010100011 |
3 | 1110212220001202 |
4 | 1100312322203 |
5 | 20411241301 |
6 | 2034151415 |
7 | 345111143 |
oct | 120667243 |
9 | 43786052 |
10 | 21196451 |
11 | 10a68231 |
12 | 712256b |
13 | 4511ba3 |
14 | 2b5a923 |
15 | 1cda66b |
hex | 1436ea3 |
21196451 has 2 divisors, whose sum is σ = 21196452. Its totient is φ = 21196450.
The previous prime is 21196447. The next prime is 21196453. The reversal of 21196451 is 15469112.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 21196451 - 22 = 21196447 is a prime.
Together with 21196453, it forms a pair of twin primes.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (21196453) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10598225 + 10598226.
It is an arithmetic number, because the mean of its divisors is an integer number (10598226).
Almost surely, 221196451 is an apocalyptic number.
21196451 is a deficient number, since it is larger than the sum of its proper divisors (1).
21196451 is an equidigital number, since it uses as much as digits as its factorization.
21196451 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 2160, while the sum is 29.
The square root of 21196451 is about 4603.9603603854. The cubic root of 21196451 is about 276.7500558299.
The spelling of 21196451 in words is "twenty-one million, one hundred ninety-six thousand, four hundred fifty-one".
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