2145500505 has 24 divisors (see below), whose sum is σ = 3725783880. Its totient is φ = 1142138880.

The previous prime is 2145500491. The next prime is 2145500531. The reversal of 2145500505 is 5050055412.

It can be written as a sum of positive squares in 4 ways, for example, as 33454656 + 2112045849 = 5784^2 + 45957^2 .

It is not a de Polignac number, because 2145500505 - 2¹⁷ = 2145369433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19720 + ... + 68409.

It is an arithmetic number, because the mean of its divisors is an integer number (155240995).

Almost surely, 2^2145500505 is an apocalyptic number.

It is an amenable number.

2145500505 is a deficient number, since it is larger than the sum of its proper divisors (1580283375).

2145500505 is a wasteful number, since it uses less digits than its factorization.

2145500505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88681 (or 88678 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 2145500505 is about 46319.5477633364. The cubic root of 2145500505 is about 1289.7618904311.

Adding to 2145500505 its reverse (5050055412), we get a palindrome (7195555917).

The spelling of 2145500505 in words is "two billion, one hundred forty-five million, five hundred thousand, five hundred five".