2145523443 has 16 divisors (see below), whose sum is σ = 3382106880. Its totient is φ = 1183736736.

The previous prime is 2145523433. The next prime is 2145523469. The reversal of 2145523443 is 3443255412.

It is not a de Polignac number, because 2145523443 - 2⁴ = 2145523427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2145523433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1760905 + ... + 1762122.

It is an arithmetic number, because the mean of its divisors is an integer number (211381680).

Almost surely, 2^2145523443 is an apocalyptic number.

2145523443 is a deficient number, since it is larger than the sum of its proper divisors (1236583437).

2145523443 is a wasteful number, since it uses less digits than its factorization.

2145523443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523066.

The product of its digits is 57600, while the sum is 33.

The square root of 2145523443 is about 46319.7953687190. The cubic root of 2145523443 is about 1289.7664867872.

Adding to 2145523443 its reverse (3443255412), we get a palindrome (5588778855).

The spelling of 2145523443 in words is "two billion, one hundred forty-five million, five hundred twenty-three thousand, four hundred forty-three".