25520433 has 4 divisors (see below), whose sum is σ = 34027248. Its totient is φ = 17013620.

The previous prime is 25520423. The next prime is 25520437. The reversal of 25520433 is 33402552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25520433 - 2¹⁰ = 25519409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25520437) 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, 4253403 + ... + 4253408.

It is an arithmetic number, because the mean of its divisors is an integer number (8506812).

Almost surely, 2^25520433 is an apocalyptic number.

It is an amenable number.

25520433 is a deficient number, since it is larger than the sum of its proper divisors (8506815).

25520433 is an equidigital number, since it uses as much as digits as its factorization.

25520433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8506814.

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 25520433 is about 5051.7752325297. The cubic root of 25520433 is about 294.4168620287.

Adding to 25520433 its reverse (33402552), we get a palindrome (58922985).

The spelling of 25520433 in words is "twenty-five million, five hundred twenty thousand, four hundred thirty-three".