53551 has 2 divisors, whose sum is σ = 53552. Its totient is φ = 53550.

The previous prime is 53549. The next prime is 53569. The reversal of 53551 is 15535.

53551 is nontrivially palindromic in base 15.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53551 - 2¹ = 53549 is a prime.

Together with 53549, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26775 + 26776.

It is an arithmetic number, because the mean of its divisors is an integer number (26776).

2⁵³⁵⁵¹ is an apocalyptic number.

53551 is a deficient number, since it is larger than the sum of its proper divisors (1).

53551 is an equidigital number, since it uses as much as digits as its factorization.

53551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 375, while the sum is 19.

The square root of 53551 is about 231.4108899771. The cubic root of 53551 is about 37.6925796924.

It can be divided in two parts, 5355 and 1, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 53551 in words is "fifty-three thousand, five hundred fifty-one".