51381360 has 60 divisors (see below), whose sum is σ = 172558152. Its totient is φ = 13701504.

The previous prime is 51381347. The next prime is 51381367. The reversal of 51381360 is 6318315.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51381367) 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 11 ways as a sum of consecutive naturals, for example, 34962 + ... + 36401.

Almost surely, 2^51381360 is an apocalyptic number.

It is an amenable number.

51381360 is an abundant number, since it is smaller than the sum of its proper divisors (121176792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51381360 is a wasteful number, since it uses less digits than its factorization.

51381360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71382 (or 71373 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 51381360 is about 7168.0792406334. The cubic root of 51381360 is about 371.7650267755.

Adding to 51381360 its reverse (6318315), we get a palindrome (57699675).

The spelling of 51381360 in words is "fifty-one million, three hundred eighty-one thousand, three hundred sixty".