10091218 has 4 divisors (see below), whose sum is σ = 15136830. Its totient is φ = 5045608.

The previous prime is 10091203. The next prime is 10091231. The reversal of 10091218 is 81219001.

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., 8139609 + 1951609 = 2853^2 + 1397^2 .

It is a plaindrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2522803 + ... + 2522806.

Almost surely, 2^10091218 is an apocalyptic number.

10091218 is a deficient number, since it is larger than the sum of its proper divisors (5045612).

10091218 is an equidigital number, since it uses as much as digits as its factorization.

10091218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5045611.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 10091218 is about 3176.6677509617. The cubic root of 10091218 is about 216.0965646196.

The spelling of 10091218 in words is "ten million, ninety-one thousand, two hundred eighteen".