25520223 has 16 divisors (see below), whose sum is σ = 35398656. Its totient is φ = 16336320.

The previous prime is 25520221. The next prime is 25520267. The reversal of 25520223 is 32202552.

It is not a de Polignac number, because 25520223 - 2¹ = 25520221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25520223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25520221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11740 + ... + 13742.

It is an arithmetic number, because the mean of its divisors is an integer number (2212416).

Almost surely, 2^25520223 is an apocalyptic number.

25520223 is a deficient number, since it is larger than the sum of its proper divisors (9878433).

25520223 is a wasteful number, since it uses less digits than its factorization.

25520223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 25520223 is about 5051.7544477142. The cubic root of 25520223 is about 294.4160544704.

Adding to 25520223 its reverse (32202552), we get a palindrome (57722775).

The spelling of 25520223 in words is "twenty-five million, five hundred twenty thousand, two hundred twenty-three".