51168520 has 64 divisors (see below), whose sum is σ = 130536000. Its totient is φ = 17895168.

The previous prime is 51168497. The next prime is 51168527. The reversal of 51168520 is 2586115.

It is not an unprimeable number, because it can be changed into a prime (51168527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7291 + ... + 12469.

It is an arithmetic number, because the mean of its divisors is an integer number (2039625).

Almost surely, 2^51168520 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 51168520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65268000).

51168520 is an abundant number, since it is smaller than the sum of its proper divisors (79367480).

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

51168520 is a wasteful number, since it uses less digits than its factorization.

51168520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5222 (or 5218 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 51168520 is about 7153.2174578996. The cubic root of 51168520 is about 371.2509883697.

The spelling of 51168520 in words is "fifty-one million, one hundred sixty-eight thousand, five hundred twenty".