25571525 has 24 divisors (see below), whose sum is σ = 37021440. Its totient is φ = 17156160.

The previous prime is 25571489. The next prime is 25571527. The reversal of 25571525 is 52517552.

It is not a de Polignac number, because 25571525 - 2⁸ = 25571269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25571491 and 25571500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25571527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6671 + ... + 9779.

It is an arithmetic number, because the mean of its divisors is an integer number (1542560).

Almost surely, 2^25571525 is an apocalyptic number.

25571525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25571525 is a deficient number, since it is larger than the sum of its proper divisors (11449915).

25571525 is a wasteful number, since it uses less digits than its factorization.

25571525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3173 (or 3168 counting only the distinct ones).

The product of its digits is 17500, while the sum is 32.

The square root of 25571525 is about 5056.8295403345. The cubic root of 25571525 is about 294.6132056041.

The spelling of 25571525 in words is "twenty-five million, five hundred seventy-one thousand, five hundred twenty-five".