51327140 has 48 divisors (see below), whose sum is σ = 111720000. Its totient is φ = 19792512.

The previous prime is 51327139. The next prime is 51327163. The reversal of 51327140 is 4172315.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 102611 + ... + 103109.

It is an arithmetic number, because the mean of its divisors is an integer number (2327500).

Almost surely, 2^51327140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51327140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55860000).

51327140 is an abundant number, since it is smaller than the sum of its proper divisors (60392860).

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

51327140 is a wasteful number, since it uses less digits than its factorization.

51327140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 51327140 is about 7164.2961971152. The cubic root of 51327140 is about 371.6342128374.

Adding to 51327140 its reverse (4172315), we get a palindrome (55499455).

The spelling of 51327140 in words is "fifty-one million, three hundred twenty-seven thousand, one hundred forty".