218742148 has 6 divisors (see below), whose sum is σ = 382798766. Its totient is φ = 109371072.

The previous prime is 218742127. The next prime is 218742149. The reversal of 218742148 is 841247812.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 193822084 + 24920064 = 13922^2 + 4992^2 .

It is not an unprimeable number, because it can be changed into a prime (218742149) 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 as a sum of consecutive naturals, namely, 27342765 + ... + 27342772.

Almost surely, 2^218742148 is an apocalyptic number.

It is an amenable number.

218742148 is a deficient number, since it is larger than the sum of its proper divisors (164056618).

218742148 is a wasteful number, since it uses less digits than its factorization.

218742148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54685541 (or 54685539 counting only the distinct ones).

The product of its digits is 28672, while the sum is 37.

The square root of 218742148 is about 14789.9340093186. The cubic root of 218742148 is about 602.5283566482.

The spelling of 218742148 in words is "two hundred eighteen million, seven hundred forty-two thousand, one hundred forty-eight".