218317130 has 16 divisors (see below), whose sum is σ = 396450504. Its totient is φ = 86553600.

The previous prime is 218317103. The next prime is 218317181. The reversal of 218317130 is 31713812.

It can be written as a sum of positive squares in 4 ways, for example, as 101828281 + 116488849 = 10091^2 + 10793^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 218317130.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95471 + ... + 97730.

Almost surely, 2^218317130 is an apocalyptic number.

218317130 is a deficient number, since it is larger than the sum of its proper divisors (178133374).

218317130 is a wasteful number, since it uses less digits than its factorization.

218317130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193321.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 218317130 is about 14775.5585342822. The cubic root of 218317130 is about 602.1378642542.

The spelling of 218317130 in words is "two hundred eighteen million, three hundred seventeen thousand, one hundred thirty".