2192380687561 has 3 divisors (see below), whose sum is σ = 2192382168231. Its totient is φ = 2192379206892.

The previous prime is 2192380687531. The next prime is 2192380687571. The reversal of 2192380687561 is 1657860832912.

The square root of 2192380687561 is 1480669.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 454571259961 + 1737809427600 = 674219^2 + 1318260^2 .

It is not a de Polignac number, because 2192380687561 - 2²⁹ = 2191843816649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2192380687496 and 2192380687505.

It is not an unprimeable number, because it can be changed into a prime (2192380687531) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 740335 + ... + 2221003.

It is an arithmetic number, because the mean of its divisors is an integer number (730794056077).

Almost surely, 2^{2192380687561} is an apocalyptic number.

2192380687561 is the 1480669-th square number.

2192380687561 is the 740335-th centered octagonal number.

It is an amenable number.

2192380687561 is a deficient number, since it is larger than the sum of its proper divisors (1480670).

2192380687561 is an frugal number, since it uses more digits than its factorization.

2192380687561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2961338 (or 1480669 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 2192380687561 in words is "two trillion, one hundred ninety-two billion, three hundred eighty million, six hundred eighty-seven thousand, five hundred sixty-one".