25531025 has 24 divisors (see below), whose sum is σ = 36107064. Its totient is φ = 17740800.

The previous prime is 25531021. The next prime is 25531031. The reversal of 25531025 is 52013552.

25531025 = T₉₇₅ + T₉₇₆ + ... + T₁₀₂₅.

It can be written as a sum of positive squares in 12 ways, for example, as 9265936 + 16265089 = 3044^2 + 4033^2 .

It is not a de Polignac number, because 25531025 - 2² = 25531021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25531021) 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, 3215 + ... + 7835.

It is an arithmetic number, because the mean of its divisors is an integer number (1504461).

Almost surely, 2^25531025 is an apocalyptic number.

25531025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25531025 is a deficient number, since it is larger than the sum of its proper divisors (10576039).

25531025 is a wasteful number, since it uses less digits than its factorization.

25531025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4661 (or 4656 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 25531025 is about 5052.8234681216. The cubic root of 25531025 is about 294.4575879844.

Adding to 25531025 its reverse (52013552), we get a palindrome (77544577).

The spelling of 25531025 in words is "twenty-five million, five hundred thirty-one thousand, twenty-five".