52851220 has 12 divisors (see below), whose sum is σ = 110987604. Its totient is φ = 21140480.

The previous prime is 52851209. The next prime is 52851221. The reversal of 52851220 is 2215825.

It can be written as a sum of positive squares in 2 ways, for example, as 41113744 + 11737476 = 6412^2 + 3426^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52851221) 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 3 ways as a sum of consecutive naturals, for example, 1321261 + ... + 1321300.

It is an arithmetic number, because the mean of its divisors is an integer number (9248967).

Almost surely, 2^52851220 is an apocalyptic number.

It is an amenable number.

52851220 is an abundant number, since it is smaller than the sum of its proper divisors (58136384).

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

52851220 is a wasteful number, since it uses less digits than its factorization.

52851220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642570 (or 2642568 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 52851220 is about 7269.8844557531. The cubic root of 52851220 is about 375.2767616170.

The spelling of 52851220 in words is "fifty-two million, eight hundred fifty-one thousand, two hundred twenty".