25520263 has 4 divisors (see below), whose sum is σ = 25563328. Its totient is φ = 25477200.

The previous prime is 25520221. The next prime is 25520267. The reversal of 25520263 is 36202552.

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

It is a cyclic number.

It is not a de Polignac number, because 25520263 - 2²¹ = 23423111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25520267) 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, 20631 + ... + 21832.

It is an arithmetic number, because the mean of its divisors is an integer number (6390832).

Almost surely, 2^25520263 is an apocalyptic number.

25520263 is a deficient number, since it is larger than the sum of its proper divisors (43065).

25520263 is an equidigital number, since it uses as much as digits as its factorization.

25520263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43064.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 25520263 is about 5051.7584067332. The cubic root of 25520263 is about 294.4162082914.

The spelling of 25520263 in words is "twenty-five million, five hundred twenty thousand, two hundred sixty-three".