26551 has 4 divisors (see below), whose sum is σ = 30352. Its totient is φ = 22752.

The previous prime is 26539. The next prime is 26557. The reversal of 26551 is 15562.

26551 = 64² + 65² + ... + 69².

It is a happy number.

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 26551 - 2⁷ = 26423 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26557) 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, 1890 + ... + 1903.

It is an arithmetic number, because the mean of its divisors is an integer number (7588).

2²⁶⁵⁵¹ is an apocalyptic number.

26551 is a deficient number, since it is larger than the sum of its proper divisors (3801).

26551 is an equidigital number, since it uses as much as digits as its factorization.

26551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3800.

The product of its digits is 300, while the sum is 19.

The square root of 26551 is about 162.9447759212. The cubic root of 26551 is about 29.8327732765.

The spelling of 26551 in words is "twenty-six thousand, five hundred fifty-one".