2152145225 has 6 divisors (see below), whose sum is σ = 2668660110. Its totient is φ = 1721716160.

The previous prime is 2152145221. The next prime is 2152145267. The reversal of 2152145225 is 5225412512.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 120209296 + 2031935929 = 10964^2 + 45077^2 .

It is not a de Polignac number, because 2152145225 - 2² = 2152145221 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2152145221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43042880 + ... + 43042929.

It is an arithmetic number, because the mean of its divisors is an integer number (444776685).

Almost surely, 2^2152145225 is an apocalyptic number.

2152145225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2152145225 is a deficient number, since it is larger than the sum of its proper divisors (516514885).

2152145225 is an equidigital number, since it uses as much as digits as its factorization.

2152145225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86085819 (or 86085814 counting only the distinct ones).

The product of its digits is 8000, while the sum is 29.

The square root of 2152145225 is about 46391.2192661499. The cubic root of 2152145225 is about 1291.0920034519.

Adding to 2152145225 its reverse (5225412512), we get a palindrome (7377557737).

The spelling of 2152145225 in words is "two billion, one hundred fifty-two million, one hundred forty-five thousand, two hundred twenty-five".