51173740 has 48 divisors (see below), whose sum is σ = 116593344. Its totient is φ = 18790400.

The previous prime is 51173737. The next prime is 51173797. The reversal of 51173740 is 4737115.

51173740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51173699 and 51173708.

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 15 ways as a sum of consecutive naturals, for example, 12105 + ... + 15775.

It is an arithmetic number, because the mean of its divisors is an integer number (2429028).

Almost surely, 2^51173740 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 51173740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58296672).

51173740 is an abundant number, since it is smaller than the sum of its proper divisors (65419604).

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

51173740 is a wasteful number, since it uses less digits than its factorization.

51173740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3738 (or 3736 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 51173740 is about 7153.5823193698. The cubic root of 51173740 is about 371.2636124353.

The spelling of 51173740 in words is "fifty-one million, one hundred seventy-three thousand, seven hundred forty".