218830137 has 16 divisors (see below), whose sum is σ = 309244032. Its totient is φ = 137168640.

The previous prime is 218830127. The next prime is 218830153. The reversal of 218830137 is 731038812.

It is not a de Polignac number, because 218830137 - 2⁷ = 218830009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 218830098 and 218830107.

It is not an unprimeable number, because it can be changed into a prime (218830127) 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 15 ways as a sum of consecutive naturals, for example, 81348 + ... + 83994.

It is an arithmetic number, because the mean of its divisors is an integer number (19327752).

Almost surely, 2^218830137 is an apocalyptic number.

It is an amenable number.

218830137 is a deficient number, since it is larger than the sum of its proper divisors (90413895).

218830137 is a wasteful number, since it uses less digits than its factorization.

218830137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4288.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 218830137 is about 14792.9083347393. The cubic root of 218830137 is about 602.6091348020.

Adding to 218830137 its reverse (731038812), we get a palindrome (949868949).

The spelling of 218830137 in words is "two hundred eighteen million, eight hundred thirty thousand, one hundred thirty-seven".