10187218 has 4 divisors (see below), whose sum is σ = 15280830. Its totient is φ = 5093608.

The previous prime is 10187213. The next prime is 10187239. The reversal of 10187218 is 81278101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9259849 + 927369 = 3043^2 + 963^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (10187213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2546803 + ... + 2546806.

Almost surely, 2^10187218 is an apocalyptic number.

10187218 is a deficient number, since it is larger than the sum of its proper divisors (5093612).

10187218 is an equidigital number, since it uses as much as digits as its factorization.

10187218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5093611.

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 10187218 is about 3191.7421575058. The cubic root of 10187218 is about 216.7796612457.

The spelling of 10187218 in words is "ten million, one hundred eighty-seven thousand, two hundred eighteen".