2525665251 has 16 divisors (see below), whose sum is σ = 3464733600. Its totient is φ = 1635349248.

The previous prime is 2525665223. The next prime is 2525665253. The reversal of 2525665251 is 1525665252.

It is not a de Polignac number, because 2525665251 - 2²⁷ = 2391447523 is a prime.

It is a super-3 number, since 3×2525665251³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2525665253) 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 15 ways as a sum of consecutive naturals, for example, 43165 + ... + 83153.

It is an arithmetic number, because the mean of its divisors is an integer number (216545850).

Almost surely, 2^2525665251 is an apocalyptic number.

2525665251 is a deficient number, since it is larger than the sum of its proper divisors (939068349).

2525665251 is a wasteful number, since it uses less digits than its factorization.

2525665251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40598.

The product of its digits is 180000, while the sum is 39.

The square root of 2525665251 is about 50255.9971645176. The cubic root of 2525665251 is about 1361.8374189508.

Subtracting from 2525665251 its reverse (1525665252), we obtain a palindrome (999999999).

The spelling of 2525665251 in words is "two billion, five hundred twenty-five million, six hundred sixty-five thousand, two hundred fifty-one".