25601311 has 4 divisors (see below), whose sum is σ = 25611552. Its totient is φ = 25591072.

The previous prime is 25601291. The next prime is 25601321. The reversal of 25601311 is 11310652.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25601311 - 2¹⁷ = 25470239 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 (25601321) 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 3 ways as a sum of consecutive naturals, for example, 1386 + ... + 7288.

It is an arithmetic number, because the mean of its divisors is an integer number (6402888).

Almost surely, 2^25601311 is an apocalyptic number.

25601311 is a deficient number, since it is larger than the sum of its proper divisors (10241).

25601311 is an equidigital number, since it uses as much as digits as its factorization.

25601311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10240.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 25601311 is about 5059.7738091737. The cubic root of 25601311 is about 294.7275508109.

Adding to 25601311 its reverse (11310652), we get a palindrome (36911963).

The spelling of 25601311 in words is "twenty-five million, six hundred one thousand, three hundred eleven".