51754140 has 144 divisors (see below), whose sum is σ = 170247168. Its totient is φ = 13172544.

The previous prime is 51754139. The next prime is 51754141. The reversal of 51754140 is 4145715.

It is a happy number.

51754140 is a `hidden beast` number, since 517 + 5 + 4 + 140 = 666.

51754140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51754139) and next prime (51754141).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51754141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 111549 + ... + 112011.

It is an arithmetic number, because the mean of its divisors is an integer number (1182272).

Almost surely, 2^51754140 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 51754140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85123584).

51754140 is an abundant number, since it is smaller than the sum of its proper divisors (118493028).

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

51754140 is a wasteful number, since it uses less digits than its factorization.

51754140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 496 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 51754140 is about 7194.0350291057. The cubic root of 51754140 is about 372.6619328076.

Adding to 51754140 its reverse (4145715), we get a palindrome (55899855).

The spelling of 51754140 in words is "fifty-one million, seven hundred fifty-four thousand, one hundred forty".