52217779 has 4 divisors (see below), whose sum is σ = 52616520. Its totient is φ = 51819040.

The previous prime is 52217771. The next prime is 52217821. The reversal of 52217779 is 97771225.

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 52217779 - 2³ = 52217771 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52217771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199174 + ... + 199435.

It is an arithmetic number, because the mean of its divisors is an integer number (13154130).

Almost surely, 2^52217779 is an apocalyptic number.

52217779 is a deficient number, since it is larger than the sum of its proper divisors (398741).

52217779 is a wasteful number, since it uses less digits than its factorization.

52217779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398740.

The product of its digits is 61740, while the sum is 40.

The square root of 52217779 is about 7226.1870305162. The cubic root of 52217779 is about 373.7714556871.

The spelling of 52217779 in words is "fifty-two million, two hundred seventeen thousand, seven hundred seventy-nine".