2045555201 has 4 divisors (see below), whose sum is σ = 2045648304. Its totient is φ = 2045462100.

The previous prime is 2045555159. The next prime is 2045555251. The reversal of 2045555201 is 1025555402.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1025555402 = 2 ⋅512777701.

It is a cyclic number.

It is not a de Polignac number, because 2045555201 - 2¹⁰ = 2045554177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2045555251) 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, 6746 + ... + 64316.

It is an arithmetic number, because the mean of its divisors is an integer number (511412076).

Almost surely, 2^2045555201 is an apocalyptic number.

It is an amenable number.

2045555201 is a deficient number, since it is larger than the sum of its proper divisors (93103).

2045555201 is an equidigital number, since it uses as much as digits as its factorization.

2045555201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93102.

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 2045555201 is about 45227.8144618994. The cubic root of 2045555201 is about 1269.4153179034.

The spelling of 2045555201 in words is "two billion, forty-five million, five hundred fifty-five thousand, two hundred one".