51368 has 8 divisors (see below), whose sum is σ = 96330. Its totient is φ = 25680.

The previous prime is 51361. The next prime is 51383. The reversal of 51368 is 86315.

51368 = T₇₂ + T₇₃ + ... + T₈₇.

It can be written as a sum of positive squares in only one way, i.e., 47524 + 3844 = 218^2 + 62^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (51361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3203 + ... + 3218.

2⁵¹³⁶⁸ is an apocalyptic number.

It is an amenable number.

51368 is a deficient number, since it is larger than the sum of its proper divisors (44962).

51368 is a wasteful number, since it uses less digits than its factorization.

51368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6427 (or 6423 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 51368 is about 226.6450970129. The cubic root of 51368 is about 37.1732802305.

The spelling of 51368 in words is "fifty-one thousand, three hundred sixty-eight".