10491218 has 4 divisors (see below), whose sum is σ = 15736830. Its totient is φ = 5245608.

The previous prime is 10491181. The next prime is 10491233. The reversal of 10491218 is 81219401.

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., 10349089 + 142129 = 3217^2 + 377^2 .

It is a super-2 number, since 2×10491218² = 220131310247048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2622803 + ... + 2622806.

Almost surely, 2^10491218 is an apocalyptic number.

10491218 is a deficient number, since it is larger than the sum of its proper divisors (5245612).

10491218 is an equidigital number, since it uses as much as digits as its factorization.

10491218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5245611.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 10491218 is about 3239.0149737227. The cubic root of 10491218 is about 218.9148908599.

The spelling of 10491218 in words is "ten million, four hundred ninety-one thousand, two hundred eighteen".