2045321563 has 4 divisors (see below), whose sum is σ = 2045416968. Its totient is φ = 2045226160.

The previous prime is 2045321497. The next prime is 2045321581. The reversal of 2045321563 is 3651235402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2045321563 - 2¹³ = 2045313371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2045321263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1095 + ... + 63967.

It is an arithmetic number, because the mean of its divisors is an integer number (511354242).

Almost surely, 2^2045321563 is an apocalyptic number.

2045321563 is a deficient number, since it is larger than the sum of its proper divisors (95405).

2045321563 is an equidigital number, since it uses as much as digits as its factorization.

2045321563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95404.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 2045321563 is about 45225.2314864170. The cubic root of 2045321563 is about 1269.3669862902.

Adding to 2045321563 its reverse (3651235402), we get a palindrome (5696556965).

The spelling of 2045321563 in words is "two billion, forty-five million, three hundred twenty-one thousand, five hundred sixty-three".