51353 has 4 divisors (see below), whose sum is σ = 52020. Its totient is φ = 50688.

The previous prime is 51349. The next prime is 51361. The reversal of 51353 is 35315.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34969 + 16384 = 187^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 51353 - 2² = 51349 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200 + ... + 377.

It is an arithmetic number, because the mean of its divisors is an integer number (13005).

2⁵¹³⁵³ is an apocalyptic number.

It is an amenable number.

51353 is a deficient number, since it is larger than the sum of its proper divisors (667).

51353 is an equidigital number, since it uses as much as digits as its factorization.

51353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666.

The product of its digits is 225, while the sum is 17.

The square root of 51353 is about 226.6120032125. The cubic root of 51353 is about 37.1696615478.

Adding to 51353 its reverse (35315), we get a palindrome (86668).

It can be divided in two parts, 51 and 353, that added together give a palindrome (404).

The spelling of 51353 in words is "fifty-one thousand, three hundred fifty-three".