2165225606 has 4 divisors (see below), whose sum is σ = 3247838412. Its totient is φ = 1082612802.

The previous prime is 2165225599. The next prime is 2165225609. The reversal of 2165225606 is 6065225612.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165225609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541306400 + ... + 541306403.

It is an arithmetic number, because the mean of its divisors is an integer number (811959603).

Almost surely, 2^2165225606 is an apocalyptic number.

2165225606 is a deficient number, since it is larger than the sum of its proper divisors (1082612806).

2165225606 is a wasteful number, since it uses less digits than its factorization.

2165225606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082612805.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 2165225606 is about 46531.9847631712. The cubic root of 2165225606 is about 1293.7024029227.

The spelling of 2165225606 in words is "two billion, one hundred sixty-five million, two hundred twenty-five thousand, six hundred six".