25251525 has 72 divisors (see below), whose sum is σ = 49762440. Its totient is φ = 12165120.

The previous prime is 25251517. The next prime is 25251529. The reversal of 25251525 is 52515252.

It can be written as a sum of positive squares in 12 ways, for example, as 16016004 + 9235521 = 4002^2 + 3039^2 .

It is not a de Polignac number, because 25251525 - 2³ = 25251517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25251529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 260277 + ... + 260373.

It is an arithmetic number, because the mean of its divisors is an integer number (691145).

Almost surely, 2^25251525 is an apocalyptic number.

25251525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25251525 is a deficient number, since it is larger than the sum of its proper divisors (24510915).

25251525 is a wasteful number, since it uses less digits than its factorization.

25251525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 207 counting only the distinct ones).

The product of its digits is 5000, while the sum is 27.

The square root of 25251525 is about 5025.0895514408. The cubic root of 25251525 is about 293.3791214967.

Adding to 25251525 its reverse (52515252), we get a palindrome (77766777).

The spelling of 25251525 in words is "twenty-five million, two hundred fifty-one thousand, five hundred twenty-five".