52218890 has 8 divisors (see below), whose sum is σ = 93994020. Its totient is φ = 20887552.

The previous prime is 52218863. The next prime is 52218893. The reversal of 52218890 is 9881225.

It can be written as a sum of positive squares in 2 ways, for example, as 45873529 + 6345361 = 6773^2 + 2519^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 52218890.

It is not an unprimeable number, because it can be changed into a prime (52218893) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2610935 + ... + 2610954.

Almost surely, 2^52218890 is an apocalyptic number.

52218890 is a deficient number, since it is larger than the sum of its proper divisors (41775130).

52218890 is a wasteful number, since it uses less digits than its factorization.

52218890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5221896.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 52218890 is about 7226.2639032906. The cubic root of 52218890 is about 373.7741064901.

The spelling of 52218890 in words is "fifty-two million, two hundred eighteen thousand, eight hundred ninety".