51140544 has 112 divisors (see below), whose sum is σ = 166591488. Its totient is φ = 13483008.

The previous prime is 51140491. The next prime is 51140563. The reversal of 51140544 is 44504115.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 16009 + ... + 18935.

It is an arithmetic number, because the mean of its divisors is an integer number (1487424).

Almost surely, 2^51140544 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 51140544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83295744).

51140544 is an abundant number, since it is smaller than the sum of its proper divisors (115450944).

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

51140544 is a wasteful number, since it uses less digits than its factorization.

51140544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962 (or 2952 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 51140544 is about 7151.2617068598. The cubic root of 51140544 is about 371.1833164816.

Adding to 51140544 its reverse (44504115), we get a palindrome (95644659).

The spelling of 51140544 in words is "fifty-one million, one hundred forty thousand, five hundred forty-four".