52216720 has 40 divisors (see below), whose sum is σ = 121956480. Its totient is φ = 20791680.

The previous prime is 52216699. The next prime is 52216727. The reversal of 52216720 is 2761225.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (52216727) 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, 17755 + ... + 20485.

It is an arithmetic number, because the mean of its divisors is an integer number (3048912).

Almost surely, 2^52216720 is an apocalyptic number.

It is an amenable number.

52216720 is an abundant number, since it is smaller than the sum of its proper divisors (69739760).

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

52216720 is a wasteful number, since it uses less digits than its factorization.

52216720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2983 (or 2977 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 52216720 is about 7226.1137549861. The cubic root of 52216720 is about 373.7689289191.

Adding to 52216720 its reverse (2761225), we get a palindrome (54977945).

The spelling of 52216720 in words is "fifty-two million, two hundred sixteen thousand, seven hundred twenty".