52130520 has 256 divisors, whose sum is σ = 193536000. Its totient is φ = 12400128.

The previous prime is 52130503. The next prime is 52130527. The reversal of 52130520 is 2503125.

It is a happy number.

It is a super-2 number, since 2×52130520² = 5435182230940800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 52130493 and 52130502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52130527) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 659841 + ... + 659919.

It is an arithmetic number, because the mean of its divisors is an integer number (756000).

Almost surely, 2^52130520 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 52130520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96768000).

52130520 is an abundant number, since it is smaller than the sum of its proper divisors (141405480).

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

52130520 is a wasteful number, since it uses less digits than its factorization.

52130520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 52130520 is about 7220.1468129118. The cubic root of 52130520 is about 373.5631415323.

Adding to 52130520 its reverse (2503125), we get a palindrome (54633645).

It can be divided in two parts, 52130 and 520, that added together give a triangular number (52650 = T₃₂₄).

The spelling of 52130520 in words is "fifty-two million, one hundred thirty thousand, five hundred twenty".