25415525 has 6 divisors (see below), whose sum is σ = 31515282. Its totient is φ = 20332400.

The previous prime is 25415519. The next prime is 25415549. The reversal of 25415525 is 52551452.

It can be written as a sum of positive squares in 3 ways, for example, as 3844 + 25411681 = 62^2 + 5041^2 .

It is not a de Polignac number, because 25415525 - 2¹⁴ = 25399141 is a prime.

It is a super-2 number, since 2×25415525² = 1291897822051250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 508286 + ... + 508335.

It is an arithmetic number, because the mean of its divisors is an integer number (5252547).

Almost surely, 2^25415525 is an apocalyptic number.

25415525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25415525 is a deficient number, since it is larger than the sum of its proper divisors (6099757).

25415525 is a wasteful number, since it uses less digits than its factorization.

25415525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016631 (or 1016626 counting only the distinct ones).

The product of its digits is 10000, while the sum is 29.

The square root of 25415525 is about 5041.3812591392. The cubic root of 25415525 is about 294.0128837274.

Adding to 25415525 its reverse (52551452), we get a palindrome (77966977).

The spelling of 25415525 in words is "twenty-five million, four hundred fifteen thousand, five hundred twenty-five".