25580225 has 24 divisors (see below), whose sum is σ = 34872768. Its totient is φ = 18459200.

The previous prime is 25580221. The next prime is 25580231. The reversal of 25580225 is 52208552.

It is not a de Polignac number, because 25580225 - 2² = 25580221 is a prime.

It is a super-2 number, since 2×25580225² = 1308695822101250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25580221) 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, 45647 + ... + 46203.

It is an arithmetic number, because the mean of its divisors is an integer number (1453032).

Almost surely, 2^25580225 is an apocalyptic number.

25580225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25580225 is a deficient number, since it is larger than the sum of its proper divisors (9292543).

25580225 is a wasteful number, since it uses less digits than its factorization.

25580225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745 (or 740 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 25580225 is about 5057.6896899671. The cubic root of 25580225 is about 294.6466131315.

Adding to 25580225 its reverse (52208552), we get a palindrome (77788777).

It can be divided in two parts, 2 and 5580225, that multiplied together give a triangular number (11160450 = T₄₇₂₄).

The spelling of 25580225 in words is "twenty-five million, five hundred eighty thousand, two hundred twenty-five".