51174720 has 112 divisors (see below), whose sum is σ = 180563520. Its totient is φ = 13644288.

The previous prime is 51174719. The next prime is 51174727. The reversal of 51174720 is 2747115.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51174727) 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 15 ways as a sum of consecutive naturals, for example, 5679 + ... + 11601.

Almost surely, 2^51174720 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 51174720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90281760).

51174720 is an abundant number, since it is smaller than the sum of its proper divisors (129388800).

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

51174720 is a wasteful number, since it uses less digits than its factorization.

51174720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5949 (or 5933 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 51174720 is about 7153.6508161917. The cubic root of 51174720 is about 371.2659823749.

The spelling of 51174720 in words is "fifty-one million, one hundred seventy-four thousand, seven hundred twenty".