161882195 has 4 divisors (see below), whose sum is σ = 194258640. Its totient is φ = 129505752.

The previous prime is 161882183. The next prime is 161882197. The reversal of 161882195 is 591288161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 591288161 = 22769 ⋅25969.

It is a cyclic number.

It is not a de Polignac number, because 161882195 - 2¹² = 161878099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161882197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16188215 + ... + 16188224.

It is an arithmetic number, because the mean of its divisors is an integer number (48564660).

Almost surely, 2^161882195 is an apocalyptic number.

161882195 is a deficient number, since it is larger than the sum of its proper divisors (32376445).

161882195 is an equidigital number, since it uses as much as digits as its factorization.

161882195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32376444.

The product of its digits is 34560, while the sum is 41.

The square root of 161882195 is about 12723.2934022603. The cubic root of 161882195 is about 545.0040063673.

The spelling of 161882195 in words is "one hundred sixty-one million, eight hundred eighty-two thousand, one hundred ninety-five".