2525 has 6 divisors (see below), whose sum is σ = 3162. Its totient is φ = 2000.

The previous prime is 2521. The next prime is 2531. The reversal of 2525 is 5252.

2525 = 28² + 29² + 30².

It can be written as a sum of positive squares in 3 ways, for example, as 676 + 1849 = 26^2 + 43^2 .

It is not a de Polignac number, because 2525 - 2² = 2521 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

2525 is an undulating number in base 10.

It is a Curzon number.

It is a plaindrome in base 16.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521) 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, 26 + ... + 75.

It is an arithmetic number, because the mean of its divisors is an integer number (527).

2525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2525 is a deficient number, since it is larger than the sum of its proper divisors (637).

2525 is a wasteful number, since it uses less digits than its factorization.

2525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 106 counting only the distinct ones).

The product of its digits is 100, while the sum is 14.

The square root of 2525 is about 50.2493781056. The cubic root of 2525 is about 13.6171784078.

Adding to 2525 its reverse (5252), we get a palindrome (7777).

The spelling of 2525 in words is "two thousand, five hundred twenty-five".