51130520 has 96 divisors (see below), whose sum is σ = 140972400. Its totient is φ = 16595712.

The previous prime is 51130507. The next prime is 51130529. The reversal of 51130520 is 2503115.

It is a super-2 number, since 2×51130520² = 5228660150940800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51130529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36554 + ... + 37926.

Almost surely, 2^51130520 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 51130520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70486200).

51130520 is an abundant number, since it is smaller than the sum of its proper divisors (89841880).

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

51130520 is a wasteful number, since it uses less digits than its factorization.

51130520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417 (or 1406 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 51130520 is about 7150.5608171667. The cubic root of 51130520 is about 371.1590631567.

Adding to 51130520 its reverse (2503115), we get a palindrome (53633635).

The spelling of 51130520 in words is "fifty-one million, one hundred thirty thousand, five hundred twenty".