2143245365 has 4 divisors (see below), whose sum is σ = 2571894444. Its totient is φ = 1714596288.

The previous prime is 2143245359. The next prime is 2143245383. The reversal of 2143245365 is 5635423412.

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 262375204 + 1880870161 = 16198^2 + 43369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143245365 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 214324532 + ... + 214324541.

It is an arithmetic number, because the mean of its divisors is an integer number (642973611).

Almost surely, 2^2143245365 is an apocalyptic number.

It is an amenable number.

2143245365 is a deficient number, since it is larger than the sum of its proper divisors (428649079).

2143245365 is an equidigital number, since it uses as much as digits as its factorization.

2143245365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428649078.

The product of its digits is 86400, while the sum is 35.

The square root of 2143245365 is about 46295.1980771224. The cubic root of 2143245365 is about 1289.3098415511.

Adding to 2143245365 its reverse (5635423412), we get a palindrome (7778668777).

The spelling of 2143245365 in words is "two billion, one hundred forty-three million, two hundred forty-five thousand, three hundred sixty-five".