51471420 has 192 divisors, whose sum is σ = 193729536. Its totient is φ = 9861120.

The previous prime is 51471397. The next prime is 51471421. The reversal of 51471420 is 2417415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51471421) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 59632 + ... + 60488.

It is an arithmetic number, because the mean of its divisors is an integer number (1009008).

Almost surely, 2^51471420 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 51471420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96864768).

51471420 is an abundant number, since it is smaller than the sum of its proper divisors (142258116).

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

51471420 is a wasteful number, since it uses less digits than its factorization.

51471420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900 (or 898 counting only the distinct ones).

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

The square root of 51471420 is about 7174.3585079086. The cubic root of 51471420 is about 371.9821068975.

Adding to 51471420 its reverse (2417415), we get a palindrome (53888835).

The spelling of 51471420 in words is "fifty-one million, four hundred seventy-one thousand, four hundred twenty".