52563816 has 56 divisors (see below), whose sum is σ = 147784530. Its totient is φ = 17519328.

The previous prime is 52563811. The next prime is 52563821. The reversal of 52563816 is 61836525.

52563816 is a `hidden beast` number, since 5 + 2 + 5 + 638 + 16 = 666.

It is an interprime number because it is at equal distance from previous prime (52563811) and next prime (52563821).

It can be written as a sum of positive squares in only one way, i.e., 45562500 + 7001316 = 6750^2 + 2646^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (52563811) 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 13 ways as a sum of consecutive naturals, for example, 1326 + ... + 10338.

Almost surely, 2^52563816 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 52563816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73892265).

52563816 is an abundant number, since it is smaller than the sum of its proper divisors (95220714).

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

52563816 is an equidigital number, since it uses as much as digits as its factorization.

52563816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9037 (or 9018 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 52563816 is about 7250.0907580526. The cubic root of 52563816 is about 374.5952753517.

The spelling of 52563816 in words is "fifty-two million, five hundred sixty-three thousand, eight hundred sixteen".