2125543445 has 4 divisors (see below), whose sum is σ = 2550652140. Its totient is φ = 1700434752.

The previous prime is 2125543417. The next prime is 2125543457. The reversal of 2125543445 is 5443455212.

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 1419631684 + 705911761 = 37678^2 + 26569^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2125543445 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, 212554340 + ... + 212554349.

It is an arithmetic number, because the mean of its divisors is an integer number (637663035).

Almost surely, 2^2125543445 is an apocalyptic number.

It is an amenable number.

2125543445 is a deficient number, since it is larger than the sum of its proper divisors (425108695).

2125543445 is an equidigital number, since it uses as much as digits as its factorization.

2125543445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425108694.

The product of its digits is 96000, while the sum is 35.

The square root of 2125543445 is about 46103.6163982827. The cubic root of 2125543445 is about 1285.7503820759.

Adding to 2125543445 its reverse (5443455212), we get a palindrome (7568998657).

The spelling of 2125543445 in words is "two billion, one hundred twenty-five million, five hundred forty-three thousand, four hundred forty-five".