2205645549 has 4 divisors (see below), whose sum is σ = 2940860736. Its totient is φ = 1470430364.

The previous prime is 2205645539. The next prime is 2205645613. The reversal of 2205645549 is 9455465022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2205645549 - 2¹¹ = 2205643501 is a prime.

It is a super-2 number, since 2×2205645549² = 9729744575647022802, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2205645549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2205645539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367607589 + ... + 367607594.

It is an arithmetic number, because the mean of its divisors is an integer number (735215184).

Almost surely, 2^2205645549 is an apocalyptic number.

It is an amenable number.

2205645549 is a deficient number, since it is larger than the sum of its proper divisors (735215187).

2205645549 is an equidigital number, since it uses as much as digits as its factorization.

2205645549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735215186.

The product of its (nonzero) digits is 432000, while the sum is 42.

The square root of 2205645549 is about 46964.3007932621. The cubic root of 2205645549 is about 1301.7030045730.

The spelling of 2205645549 in words is "two billion, two hundred five million, six hundred forty-five thousand, five hundred forty-nine".