2193142561 has 3 divisors (see below), whose sum is σ = 2193189393. Its totient is φ = 2193095730.

The previous prime is 2193142559. The next prime is 2193142571. The reversal of 2193142561 is 1652413912.

The square root of 2193142561 is 46831.

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 is not a de Polignac number, because 2193142561 - 2¹ = 2193142559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2193142531) 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 2 ways as a sum of consecutive naturals, for example, 23416 + ... + 70246.

It is an arithmetic number, because the mean of its divisors is an integer number (731063131).

Almost surely, 2^2193142561 is an apocalyptic number.

2193142561 is the 46831-st square number.

2193142561 is the 23416-th centered octagonal number.

It is an amenable number.

2193142561 is a deficient number, since it is larger than the sum of its proper divisors (46832).

2193142561 is an frugal number, since it uses more digits than its factorization.

2193142561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93662 (or 46831 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The cubic root of 2193142561 is about 1299.2387181847.

The spelling of 2193142561 in words is "two billion, one hundred ninety-three million, one hundred forty-two thousand, five hundred sixty-one".