2145532225 has 6 divisors (see below), whose sum is σ = 2660459990. Its totient is φ = 1716425760.

The previous prime is 2145532211. The next prime is 2145532229. The reversal of 2145532225 is 5222355412.

It can be written as a sum of positive squares in 3 ways, for example, as 27415696 + 2118116529 = 5236^2 + 46023^2 .

It is not a de Polignac number, because 2145532225 - 2¹³ = 2145524033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2145532229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42910620 + ... + 42910669.

Almost surely, 2^2145532225 is an apocalyptic number.

2145532225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2145532225 is a deficient number, since it is larger than the sum of its proper divisors (514927765).

2145532225 is an equidigital number, since it uses as much as digits as its factorization.

2145532225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85821299 (or 85821294 counting only the distinct ones).

The product of its digits is 24000, while the sum is 31.

The square root of 2145532225 is about 46319.8901661047. The cubic root of 2145532225 is about 1289.7682465309.

Adding to 2145532225 its reverse (5222355412), we get a palindrome (7367887637).

The spelling of 2145532225 in words is "two billion, one hundred forty-five million, five hundred thirty-two thousand, two hundred twenty-five".