52215611 has 4 divisors (see below), whose sum is σ = 59674992. Its totient is φ = 44756232.

The previous prime is 52215607. The next prime is 52215641. The reversal of 52215611 is 11651225.

It is a happy number.

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 52215611 - 2² = 52215607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a 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 in 3 ways as a sum of consecutive naturals, for example, 3729680 + ... + 3729693.

It is an arithmetic number, because the mean of its divisors is an integer number (14918748).

Almost surely, 2^52215611 is an apocalyptic number.

52215611 is a deficient number, since it is larger than the sum of its proper divisors (7459381).

52215611 is an equidigital number, since it uses as much as digits as its factorization.

52215611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7459380.

The product of its digits is 600, while the sum is 23.

The square root of 52215611 is about 7226.0370190029. The cubic root of 52215611 is about 373.7662828147.

Adding to 52215611 its reverse (11651225), we get a palindrome (63866836).

The spelling of 52215611 in words is "fifty-two million, two hundred fifteen thousand, six hundred eleven".