2192998561 has 4 divisors (see below), whose sum is σ = 2361690772. Its totient is φ = 2024306352.

The previous prime is 2192998523. The next prime is 2192998583. The reversal of 2192998561 is 1658992912.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 915365025 + 1277633536 = 30255^2 + 35744^2 .

It is a cyclic number.

It is not a de Polignac number, because 2192998561 - 2⁷ = 2192998433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2192998499 and 2192998508.

It is not an unprimeable number, because it can be changed into a prime (2192998501) 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, 84346086 + ... + 84346111.

It is an arithmetic number, because the mean of its divisors is an integer number (590422693).

Almost surely, 2^2192998561 is an apocalyptic number.

It is an amenable number.

2192998561 is a deficient number, since it is larger than the sum of its proper divisors (168692211).

2192998561 is a wasteful number, since it uses less digits than its factorization.

2192998561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168692210.

The product of its digits is 699840, while the sum is 52.

The square root of 2192998561 is about 46829.4625316157. The cubic root of 2192998561 is about 1299.2102819012.

The spelling of 2192998561 in words is "two billion, one hundred ninety-two million, nine hundred ninety-eight thousand, five hundred sixty-one".