52216831 has 4 divisors (see below), whose sum is σ = 54487152. Its totient is φ = 49946512.

The previous prime is 52216811. The next prime is 52216837. The reversal of 52216831 is 13861225.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 52216831 - 2⁵ = 52216799 is a prime.

It is a super-2 number, since 2×52216831² = 5453194879365122, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 52216831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52216837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1135126 + ... + 1135171.

It is an arithmetic number, because the mean of its divisors is an integer number (13621788).

Almost surely, 2^52216831 is an apocalyptic number.

52216831 is a deficient number, since it is larger than the sum of its proper divisors (2270321).

52216831 is a wasteful number, since it uses less digits than its factorization.

52216831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270320.

The product of its digits is 2880, while the sum is 28.

The square root of 52216831 is about 7226.1214354590. The cubic root of 52216831 is about 373.7691937660.

The spelling of 52216831 in words is "fifty-two million, two hundred sixteen thousand, eight hundred thirty-one".