2145512245 has 4 divisors (see below), whose sum is σ = 2574614700. Its totient is φ = 1716409792.

The previous prime is 2145512227. The next prime is 2145512269. The reversal of 2145512245 is 5422155412.

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

It can be written as a sum of positive squares in 2 ways, for example, as 473193009 + 1672319236 = 21753^2 + 40894^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145512245 - 2²¹ = 2143415093 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214551220 + ... + 214551229.

It is an arithmetic number, because the mean of its divisors is an integer number (643653675).

Almost surely, 2^2145512245 is an apocalyptic number.

It is an amenable number.

2145512245 is a deficient number, since it is larger than the sum of its proper divisors (429102455).

2145512245 is an equidigital number, since it uses as much as digits as its factorization.

2145512245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429102454.

The product of its digits is 16000, while the sum is 31.

The square root of 2145512245 is about 46319.6744915160. The cubic root of 2145512245 is about 1289.7642429167.

Adding to 2145512245 its reverse (5422155412), we get a palindrome (7567667657).

The spelling of 2145512245 in words is "two billion, one hundred forty-five million, five hundred twelve thousand, two hundred forty-five".