51630144 has 56 divisors (see below), whose sum is σ = 143804640. Its totient is φ = 16303104.

The previous prime is 51630091. The next prime is 51630149. The reversal of 51630144 is 44103615.

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

It is not an unprimeable number, because it can be changed into a prime (51630149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3429 + ... + 10724.

It is an arithmetic number, because the mean of its divisors is an integer number (2567940).

Almost surely, 2^51630144 is an apocalyptic number.

It is an amenable number.

51630144 is an abundant number, since it is smaller than the sum of its proper divisors (92174496).

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

51630144 is a wasteful number, since it uses less digits than its factorization.

51630144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14187 (or 14177 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 51630144 is about 7185.4118879853. The cubic root of 51630144 is about 372.3640787524.

Adding to 51630144 its reverse (44103615), we get a palindrome (95733759).

The spelling of 51630144 in words is "fifty-one million, six hundred thirty thousand, one hundred forty-four".