52158820 has 72 divisors (see below), whose sum is σ = 129939264. Its totient is φ = 17227392.

The previous prime is 52158817. The next prime is 52158851. The reversal of 52158820 is 2885125.

52158820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 23 ways as a sum of consecutive naturals, for example, 117519 + ... + 117961.

It is an arithmetic number, because the mean of its divisors is an integer number (1804712).

Almost surely, 2^52158820 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 52158820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64969632).

52158820 is an abundant number, since it is smaller than the sum of its proper divisors (77780444).

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

52158820 is a wasteful number, since it uses less digits than its factorization.

52158820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 52158820 is about 7222.1063409507. The cubic root of 52158820 is about 373.6307278167.

The spelling of 52158820 in words is "fifty-two million, one hundred fifty-eight thousand, eight hundred twenty".