25155225 has 48 divisors (see below), whose sum is σ = 46872000. Its totient is φ = 13224960.

The previous prime is 25155211. The next prime is 25155233. The reversal of 25155225 is 52255152.

It is not a de Polignac number, because 25155225 - 2¹⁰ = 25154201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55801 + ... + 56249.

It is an arithmetic number, because the mean of its divisors is an integer number (976500).

Almost surely, 2^25155225 is an apocalyptic number.

25155225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25155225 is a deficient number, since it is larger than the sum of its proper divisors (21716775).

25155225 is a wasteful number, since it uses less digits than its factorization.

25155225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551 (or 540 counting only the distinct ones).

The product of its digits is 5000, while the sum is 27.

The square root of 25155225 is about 5015.4984797127. The cubic root of 25155225 is about 293.0056998196.

Subtracting from 25155225 its product of digits (5000), we obtain a square (25150225 = 5015²).

The spelling of 25155225 in words is "twenty-five million, one hundred fifty-five thousand, two hundred twenty-five".