51472140 has 96 divisors (see below), whose sum is σ = 153189120. Its totient is φ = 12877056.

The previous prime is 51472123. The next prime is 51472163. The reversal of 51472140 is 4127415.

It is a self number, because there is not a number n which added to its sum of digits gives 51472140.

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 31 ways as a sum of consecutive naturals, for example, 185682 + ... + 185958.

It is an arithmetic number, because the mean of its divisors is an integer number (1595720).

Almost surely, 2^51472140 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 51472140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76594560).

51472140 is an abundant number, since it is smaller than the sum of its proper divisors (101716980).

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

51472140 is a wasteful number, since it uses less digits than its factorization.

51472140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 51472140 is about 7174.4086864354. The cubic root of 51472140 is about 371.9838413608.

Adding to 51472140 its reverse (4127415), we get a palindrome (55599555).

The spelling of 51472140 in words is "fifty-one million, four hundred seventy-two thousand, one hundred forty".