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43243321421 is a prime number
BaseRepresentation
bin101000010001100000…
…001011100001001101
311010121200221100002002
4220101200023201031
51202030242241141
631510554242045
73060416111246
oct502140134115
9133550840062
1043243321421
1117380800473
12846a126325
134101cab671
142143231ccd
1511d15e0e9b
hexa1180b84d

43243321421 has 2 divisors, whose sum is σ = 43243321422. Its totient is φ = 43243321420.

The previous prime is 43243321307. The next prime is 43243321423. The reversal of 43243321421 is 12412334234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38225724196 + 5017597225 = 195514^2 + 70835^2 .

It is a cyclic number.

It is not a de Polignac number, because 43243321421 - 210 = 43243320397 is a prime.

Together with 43243321423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43243321423) 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, 21621660710 + 21621660711.

It is an arithmetic number, because the mean of its divisors is an integer number (21621660711).

Almost surely, 243243321421 is an apocalyptic number.

It is an amenable number.

43243321421 is a deficient number, since it is larger than the sum of its proper divisors (1).

43243321421 is an equidigital number, since it uses as much as digits as its factorization.

43243321421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 29.

Adding to 43243321421 its reverse (12412334234), we get a palindrome (55655655655).

The spelling of 43243321421 in words is "forty-three billion, two hundred forty-three million, three hundred twenty-one thousand, four hundred twenty-one".