2161782195 has 32 divisors (see below), whose sum is σ = 3547623744. Its totient is φ = 1123430400.

The previous prime is 2161782193. The next prime is 2161782197. The reversal of 2161782195 is 5912871612.

It is an interprime number because it is at equal distance from previous prime (2161782193) and next prime (2161782197).

It is not a de Polignac number, because 2161782195 - 2¹ = 2161782193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2161782193) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 650859 + ... + 654171.

It is an arithmetic number, because the mean of its divisors is an integer number (110863242).

Almost surely, 2^2161782195 is an apocalyptic number.

2161782195 is a deficient number, since it is larger than the sum of its proper divisors (1385841549).

2161782195 is a wasteful number, since it uses less digits than its factorization.

2161782195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4423.

The product of its digits is 60480, while the sum is 42.

The square root of 2161782195 is about 46494.9695666101. The cubic root of 2161782195 is about 1293.0162369084.

The spelling of 2161782195 in words is "two billion, one hundred sixty-one million, seven hundred eighty-two thousand, one hundred ninety-five".