161052191 has 2 divisors, whose sum is σ = 161052192. Its totient is φ = 161052190.

The previous prime is 161052179. The next prime is 161052239. The reversal of 161052191 is 191250161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161052191 - 2¹⁰ = 161051167 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161052191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161057191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80526095 + 80526096.

It is an arithmetic number, because the mean of its divisors is an integer number (80526096).

Almost surely, 2^161052191 is an apocalyptic number.

161052191 is a deficient number, since it is larger than the sum of its proper divisors (1).

161052191 is an equidigital number, since it uses as much as digits as its factorization.

161052191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 26.

The square root of 161052191 is about 12690.6339873152. The cubic root of 161052191 is about 544.0709599170.

The spelling of 161052191 in words is "one hundred sixty-one million, fifty-two thousand, one hundred ninety-one".