52215643 has 2 divisors, whose sum is σ = 52215644. Its totient is φ = 52215642.

The previous prime is 52215641. The next prime is 52215661. The reversal of 52215643 is 34651225.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 52215643 - 2¹ = 52215641 is a prime.

Together with 52215641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (52215641) 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 as a sum of consecutive naturals, namely, 26107821 + 26107822.

It is an arithmetic number, because the mean of its divisors is an integer number (26107822).

Almost surely, 2^52215643 is an apocalyptic number.

52215643 is a deficient number, since it is larger than the sum of its proper divisors (1).

52215643 is an equidigital number, since it uses as much as digits as its factorization.

52215643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 28.

The square root of 52215643 is about 7226.0392332176. The cubic root of 52215643 is about 373.7663591681.

Adding to 52215643 its reverse (34651225), we get a palindrome (86866868).

The spelling of 52215643 in words is "fifty-two million, two hundred fifteen thousand, six hundred forty-three".