2190242161 has 4 divisors (see below), whose sum is σ = 2211506752. Its totient is φ = 2168977572.

The previous prime is 2190242123. The next prime is 2190242167. The reversal of 2190242161 is 1612420912.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2190242161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2190242167) 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 in 3 ways as a sum of consecutive naturals, for example, 10632141 + ... + 10632346.

It is an arithmetic number, because the mean of its divisors is an integer number (552876688).

Almost surely, 2^2190242161 is an apocalyptic number.

It is an amenable number.

2190242161 is a deficient number, since it is larger than the sum of its proper divisors (21264591).

2190242161 is a wasteful number, since it uses less digits than its factorization.

2190242161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21264590.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 2190242161 is about 46800.0230876011. The cubic root of 2190242161 is about 1298.6657239120.

The spelling of 2190242161 in words is "two billion, one hundred ninety million, two hundred forty-two thousand, one hundred sixty-one".