43194519101 has 2 divisors, whose sum is σ = 43194519102. Its totient is φ = 43194519100.

The previous prime is 43194519097. The next prime is 43194519103. The reversal of 43194519101 is 10191549134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24507902500 + 18686616601 = 156550^2 + 136699^2 .

It is a cyclic number.

It is not a de Polignac number, because 43194519101 - 2² = 43194519097 is a prime.

Together with 43194519103, 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 (43194519103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21597259550 + 21597259551.

It is an arithmetic number, because the mean of its divisors is an integer number (21597259551).

Almost surely, 2^43194519101 is an apocalyptic number.

It is an amenable number.

43194519101 is a deficient number, since it is larger than the sum of its proper divisors (1).

43194519101 is an equidigital number, since it uses as much as digits as its factorization.

43194519101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 38.

The spelling of 43194519101 in words is "forty-three billion, one hundred ninety-four million, five hundred nineteen thousand, one hundred one".