2545221105 has 48 divisors (see below), whose sum is σ = 5215841280. Its totient is φ = 1123403904.

The previous prime is 2545221061. The next prime is 2545221137. The reversal of 2545221105 is 5011225452.

2545221105 is a `hidden beast` number, since 2 + 545 + 2 + 2 + 110 + 5 = 666.

It is not a de Polignac number, because 2545221105 - 2⁸ = 2545220849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 130177 + ... + 148446.

It is an arithmetic number, because the mean of its divisors is an integer number (108663360).

Almost surely, 2^2545221105 is an apocalyptic number.

It is an amenable number.

2545221105 is an abundant number, since it is smaller than the sum of its proper divisors (2670620175).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2545221105 is a wasteful number, since it uses less digits than its factorization.

2545221105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278670 (or 278667 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 2545221105 is about 50450.1843901487. The cubic root of 2545221105 is about 1365.3432216657.

Adding to 2545221105 its reverse (5011225452), we get a palindrome (7556446557).

The spelling of 2545221105 in words is "two billion, five hundred forty-five million, two hundred twenty-one thousand, one hundred five".