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212415535421 is a prime number
BaseRepresentation
bin1100010111010011110…
…0111101100100111101
3202022021121022020021122
43011310330331210331
511440011334113141
6241325442040325
721226566155165
oct3056474754475
9668247266248
10212415535421
11820a3039781
12352016490a5
13170525a453b
14a3d0d895a5
1557d342664b
hex3174f3d93d

212415535421 has 2 divisors, whose sum is σ = 212415535422. Its totient is φ = 212415535420.

The previous prime is 212415535393. The next prime is 212415535459. The reversal of 212415535421 is 124535514212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165172339396 + 47243196025 = 406414^2 + 217355^2 .

It is a cyclic number.

It is not a de Polignac number, because 212415535421 - 222 = 212411341117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212415535021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106207767710 + 106207767711.

It is an arithmetic number, because the mean of its divisors is an integer number (106207767711).

Almost surely, 2212415535421 is an apocalyptic number.

It is an amenable number.

212415535421 is a deficient number, since it is larger than the sum of its proper divisors (1).

212415535421 is an equidigital number, since it uses as much as digits as its factorization.

212415535421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48000, while the sum is 35.

The spelling of 212415535421 in words is "two hundred twelve billion, four hundred fifteen million, five hundred thirty-five thousand, four hundred twenty-one".