2122375565 has 4 divisors (see below), whose sum is σ = 2546850684. Its totient is φ = 1697900448.

The previous prime is 2122375559. The next prime is 2122375573. The reversal of 2122375565 is 5655732212.

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 739948804 + 1382426761 = 27202^2 + 37181^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122375565 - 2⁸ = 2122375309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212237552 + ... + 212237561.

It is an arithmetic number, because the mean of its divisors is an integer number (636712671).

Almost surely, 2^2122375565 is an apocalyptic number.

It is an amenable number.

2122375565 is a deficient number, since it is larger than the sum of its proper divisors (424475119).

2122375565 is an equidigital number, since it uses as much as digits as its factorization.

2122375565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424475118.

The product of its digits is 126000, while the sum is 38.

The square root of 2122375565 is about 46069.2474976529. The cubic root of 2122375565 is about 1285.1113097318. Note that the first 3 decimals are identical.

The spelling of 2122375565 in words is "two billion, one hundred twenty-two million, three hundred seventy-five thousand, five hundred sixty-five".