212897618 has 16 divisors (see below), whose sum is σ = 326021760. Its totient is φ = 104244000.

The previous prime is 212897611. The next prime is 212897623. The reversal of 212897618 is 816798212.

It is not an unprimeable number, because it can be changed into a prime (212897611) 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 in 7 ways as a sum of consecutive naturals, for example, 16478 + ... + 26406.

It is an arithmetic number, because the mean of its divisors is an integer number (20376360).

Almost surely, 2^212897618 is an apocalyptic number.

212897618 is a deficient number, since it is larger than the sum of its proper divisors (113124142).

212897618 is a wasteful number, since it uses less digits than its factorization.

212897618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10153.

The product of its digits is 96768, while the sum is 44.

The square root of 212897618 is about 14591.0115482101. The cubic root of 212897618 is about 597.1135604524.

The spelling of 212897618 in words is "two hundred twelve million, eight hundred ninety-seven thousand, six hundred eighteen".