52217878 has 16 divisors (see below), whose sum is σ = 80712000. Its totient is φ = 25318656.

The previous prime is 52217839. The next prime is 52217911. The reversal of 52217878 is 87871225.

It is a self number, because there is not a number n which added to its sum of digits gives 52217878.

It is a congruent number.

It is an unprimeable number.

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, 25123 + ... + 27121.

It is an arithmetic number, because the mean of its divisors is an integer number (5044500).

Almost surely, 2^52217878 is an apocalyptic number.

52217878 is a deficient number, since it is larger than the sum of its proper divisors (28494122).

52217878 is a wasteful number, since it uses less digits than its factorization.

52217878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2391.

The product of its digits is 62720, while the sum is 40.

The square root of 52217878 is about 7226.1938805986. The cubic root of 52217878 is about 373.7716918988.

The spelling of 52217878 in words is "fifty-two million, two hundred seventeen thousand, eight hundred seventy-eight".