2143340245 has 4 divisors (see below), whose sum is σ = 2572008300. Its totient is φ = 1714672192.

The previous prime is 2143340191. The next prime is 2143340257. The reversal of 2143340245 is 5420433412.

It is a happy number.

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 1149955921 + 993384324 = 33911^2 + 31518^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143340245 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, 214334020 + ... + 214334029.

It is an arithmetic number, because the mean of its divisors is an integer number (643002075).

Almost surely, 2^2143340245 is an apocalyptic number.

It is an amenable number.

2143340245 is a deficient number, since it is larger than the sum of its proper divisors (428668055).

2143340245 is an equidigital number, since it uses as much as digits as its factorization.

2143340245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428668054.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 2143340245 is about 46296.2227940898. Note that the first 3 decimals coincide. The cubic root of 2143340245 is about 1289.3288668907.

Adding to 2143340245 its reverse (5420433412), we get a palindrome (7563773657).

The spelling of 2143340245 in words is "two billion, one hundred forty-three million, three hundred forty thousand, two hundred forty-five".