25561303 has 4 divisors (see below), whose sum is σ = 26672688. Its totient is φ = 24449920.

The previous prime is 25561301. The next prime is 25561309. The reversal of 25561303 is 30316552.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25561303 - 2¹ = 25561301 is a prime.

It is a super-2 number, since 2×25561303² = 1306760422115618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25561301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555658 + ... + 555703.

It is an arithmetic number, because the mean of its divisors is an integer number (6668172).

Almost surely, 2^25561303 is an apocalyptic number.

25561303 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25561303 is a deficient number, since it is larger than the sum of its proper divisors (1111385).

25561303 is a wasteful number, since it uses less digits than its factorization.

25561303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111384.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 25561303 is about 5055.8187269719. The cubic root of 25561303 is about 294.5739439964.

Adding to 25561303 its reverse (30316552), we get a palindrome (55877855).

The spelling of 25561303 in words is "twenty-five million, five hundred sixty-one thousand, three hundred three".