25151225 has 12 divisors (see below), whose sum is σ = 34023120. Its totient is φ = 18291600.

The previous prime is 25151221. The next prime is 25151233. The reversal of 25151225 is 52215152.

It is not a de Polignac number, because 25151225 - 2² = 25151221 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25151225.

It is not an unprimeable number, because it can be changed into a prime (25151221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45455 + ... + 46004.

It is an arithmetic number, because the mean of its divisors is an integer number (2835260).

Almost surely, 2^25151225 is an apocalyptic number.

25151225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25151225 is a deficient number, since it is larger than the sum of its proper divisors (8871895).

25151225 is a wasteful number, since it uses less digits than its factorization.

25151225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91480 (or 91475 counting only the distinct ones).

The product of its digits is 1000, while the sum is 23.

The square root of 25151225 is about 5015.0996999063. The cubic root of 25151225 is about 292.9901684548.

Subtracting from 25151225 its product of digits (1000), we obtain a square (25150225 = 5015²).

Adding to 25151225 its reverse (52215152), we get a palindrome (77366377).

The spelling of 25151225 in words is "twenty-five million, one hundred fifty-one thousand, two hundred twenty-five".