214891018 has 4 divisors (see below), whose sum is σ = 322336530. Its totient is φ = 107445508.

The previous prime is 214891013. The next prime is 214891021. The reversal of 214891018 is 810198412.

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., 214534609 + 356409 = 14647^2 + 597^2 .

It is not an unprimeable number, because it can be changed into a prime (214891013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53722753 + ... + 53722756.

Almost surely, 2^214891018 is an apocalyptic number.

214891018 is a deficient number, since it is larger than the sum of its proper divisors (107445512).

214891018 is a wasteful number, since it uses less digits than its factorization.

214891018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107445511.

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 214891018 is about 14659.1615722046. The cubic root of 214891018 is about 598.9714024677.

The spelling of 214891018 in words is "two hundred fourteen million, eight hundred ninety-one thousand, eighteen".