51174820 has 24 divisors (see below), whose sum is σ = 107614584. Its totient is φ = 20441856.

The previous prime is 51174817. The next prime is 51174853. The reversal of 51174820 is 2847115.

51174820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 17372224 + 33802596 = 4168^2 + 5814^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 19422 + ... + 21898.

It is an arithmetic number, because the mean of its divisors is an integer number (4483941).

Almost surely, 2^51174820 is an apocalyptic number.

It is an amenable number.

51174820 is an abundant number, since it is smaller than the sum of its proper divisors (56439764).

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

51174820 is a wasteful number, since it uses less digits than its factorization.

51174820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3519 (or 3517 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 51174820 is about 7153.6578056264. The cubic root of 51174820 is about 371.2662242038.

The spelling of 51174820 in words is "fifty-one million, one hundred seventy-four thousand, eight hundred twenty".