218210870 has 32 divisors (see below), whose sum is σ = 399791808. Its totient is φ = 85736448.

The previous prime is 218210849. The next prime is 218210879. The reversal of 218210870 is 78012812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218210879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245567 + ... + 246453.

It is an arithmetic number, because the mean of its divisors is an integer number (12493494).

Almost surely, 2^218210870 is an apocalyptic number.

218210870 is a deficient number, since it is larger than the sum of its proper divisors (181580938).

218210870 is a wasteful number, since it uses less digits than its factorization.

218210870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 218210870 is about 14771.9622934802. The cubic root of 218210870 is about 602.0401569221.

The spelling of 218210870 in words is "two hundred eighteen million, two hundred ten thousand, eight hundred seventy".