218130722 has 16 divisors (see below), whose sum is σ = 336623040. Its totient is φ = 105963312.

The previous prime is 218130719. The next prime is 218130727. The reversal of 218130722 is 227031812.

218130722 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 218130691 and 218130700.

It is not an unprimeable number, because it can be changed into a prime (218130727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 929 + ... + 20907.

It is an arithmetic number, because the mean of its divisors is an integer number (21038940).

Almost surely, 2^218130722 is an apocalyptic number.

218130722 is a deficient number, since it is larger than the sum of its proper divisors (118492318).

218130722 is a wasteful number, since it uses less digits than its factorization.

218130722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20137.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 218130722 is about 14769.2492023122. The cubic root of 218130722 is about 601.9664388968.

The spelling of 218130722 in words is "two hundred eighteen million, one hundred thirty thousand, seven hundred twenty-two".