2145306499 has 16 divisors (see below), whose sum is σ = 2514888640. Its totient is φ = 1792056960.

The previous prime is 2145306497. The next prime is 2145306529. The reversal of 2145306499 is 9946035412.

It is a cyclic number.

It is not a de Polignac number, because 2145306499 - 2¹ = 2145306497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145306497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23497 + ... + 69589.

It is an arithmetic number, because the mean of its divisors is an integer number (157180540).

Almost surely, 2^2145306499 is an apocalyptic number.

2145306499 is a deficient number, since it is larger than the sum of its proper divisors (369582141).

2145306499 is a wasteful number, since it uses less digits than its factorization.

2145306499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46270.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 2145306499 is about 46317.4535029723. The cubic root of 2145306499 is about 1289.7230138633.

The spelling of 2145306499 in words is "two billion, one hundred forty-five million, three hundred six thousand, four hundred ninety-nine".