2125133225 has 6 divisors (see below), whose sum is σ = 2635165230. Its totient is φ = 1700106560.

The previous prime is 2125133191. The next prime is 2125133233. The reversal of 2125133225 is 5223315212.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 139806976 + 1985326249 = 11824^2 + 44557^2 .

It is not a de Polignac number, because 2125133225 - 2¹⁰ = 2125132201 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2125133194 and 2125133203.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42502640 + ... + 42502689.

It is an arithmetic number, because the mean of its divisors is an integer number (439194205).

Almost surely, 2^2125133225 is an apocalyptic number.

2125133225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2125133225 is a deficient number, since it is larger than the sum of its proper divisors (510032005).

2125133225 is an equidigital number, since it uses as much as digits as its factorization.

2125133225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85005339 (or 85005334 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 2125133225 is about 46099.1672918286. The cubic root of 2125133225 is about 1285.6676621394.

Adding to 2125133225 its reverse (5223315212), we get a palindrome (7348448437).

It can be divided in two parts, 21 and 25133225, that multiplied together give a palindrome (527797725).

The spelling of 2125133225 in words is "two billion, one hundred twenty-five million, one hundred thirty-three thousand, two hundred twenty-five".