25600551 has 4 divisors (see below), whose sum is σ = 34134072. Its totient is φ = 17067032.

The previous prime is 25600529. The next prime is 25600567. The reversal of 25600551 is 15500652.

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 25600551 - 2¹⁸ = 25338407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25600501) 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, 4266756 + ... + 4266761.

It is an arithmetic number, because the mean of its divisors is an integer number (8533518).

Almost surely, 2^25600551 is an apocalyptic number.

25600551 is a deficient number, since it is larger than the sum of its proper divisors (8533521).

25600551 is an equidigital number, since it uses as much as digits as its factorization.

25600551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8533520.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 25600551 is about 5059.6987064449. The cubic root of 25600551 is about 294.7246343566.

The spelling of 25600551 in words is "twenty-five million, six hundred thousand, five hundred fifty-one".