53216500 has 24 divisors (see below), whose sum is σ = 116225928. Its totient is φ = 21286400.

The previous prime is 53216467. The next prime is 53216507. The reversal of 53216500 is 561235.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 595984 + 52620516 = 772^2 + 7254^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53216507) 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 7 ways as a sum of consecutive naturals, for example, 52717 + ... + 53716.

It is an arithmetic number, because the mean of its divisors is an integer number (4842747).

Almost surely, 2^53216500 is an apocalyptic number.

53216500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

53216500 is an abundant number, since it is smaller than the sum of its proper divisors (63009428).

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

53216500 is a wasteful number, since it uses less digits than its factorization.

53216500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106452 (or 106440 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 53216500 is about 7294.9640163609. The cubic root of 53216500 is about 376.1393496619.

Adding to 53216500 its reverse (561235), we get a palindrome (53777735).

The spelling of 53216500 in words is "fifty-three million, two hundred sixteen thousand, five hundred".