2045317591 has 4 divisors (see below), whose sum is σ = 2045495592. Its totient is φ = 2045139592.

The previous prime is 2045317537. The next prime is 2045317607. The reversal of 2045317591 is 1957135402.

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

It is a cyclic number.

It is not a de Polignac number, because 2045317591 - 2²⁹ = 1508446679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2045317591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045317531) 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, 70480 + ... + 95173.

It is an arithmetic number, because the mean of its divisors is an integer number (511373898).

Almost surely, 2^2045317591 is an apocalyptic number.

2045317591 is a deficient number, since it is larger than the sum of its proper divisors (178001).

2045317591 is a wasteful number, since it uses less digits than its factorization.

2045317591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178000.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 2045317591 is about 45225.1875728559. The cubic root of 2045317591 is about 1269.3661645891.

The spelling of 2045317591 in words is "two billion, forty-five million, three hundred seventeen thousand, five hundred ninety-one".