218236148 has 12 divisors (see below), whose sum is σ = 411291300. Its totient is φ = 100724352.

The previous prime is 218236141. The next prime is 218236171. The reversal of 218236148 is 841632812.

It can be written as a sum of positive squares in 2 ways, for example, as 9375844 + 208860304 = 3062^2 + 14452^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218236141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2098373 + ... + 2098476.

It is an arithmetic number, because the mean of its divisors is an integer number (34274275).

Almost surely, 2^218236148 is an apocalyptic number.

It is an amenable number.

218236148 is a deficient number, since it is larger than the sum of its proper divisors (193055152).

218236148 is a wasteful number, since it uses less digits than its factorization.

218236148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4196866 (or 4196864 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 218236148 is about 14772.8178760858. The cubic root of 218236148 is about 602.0634032182.

The spelling of 218236148 in words is "two hundred eighteen million, two hundred thirty-six thousand, one hundred forty-eight".