2145443345 has 32 divisors (see below), whose sum is σ = 2727043200. Its totient is φ = 1618000384.

The previous prime is 2145443329. The next prime is 2145443351. The reversal of 2145443345 is 5433445412.

It is a cyclic number.

It is not a de Polignac number, because 2145443345 - 2⁴ = 2145443329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1070114 + ... + 1072116.

It is an arithmetic number, because the mean of its divisors is an integer number (85220100).

Almost surely, 2^2145443345 is an apocalyptic number.

It is an amenable number.

2145443345 is a deficient number, since it is larger than the sum of its proper divisors (581599855).

2145443345 is a wasteful number, since it uses less digits than its factorization.

2145443345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209.

The product of its digits is 115200, while the sum is 35.

The square root of 2145443345 is about 46318.9307411128. The cubic root of 2145443345 is about 1289.7504364690.

Adding to 2145443345 its reverse (5433445412), we get a palindrome (7578888757).

The spelling of 2145443345 in words is "two billion, one hundred forty-five million, four hundred forty-three thousand, three hundred forty-five".