218653149 has 16 divisors (see below), whose sum is σ = 342506304. Its totient is φ = 122323200.

The previous prime is 218653147. The next prime is 218653163. The reversal of 218653149 is 941356812.

It is not a de Polignac number, because 218653149 - 2¹ = 218653147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218653147) 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, 254412 + ... + 255269.

It is an arithmetic number, because the mean of its divisors is an integer number (21406644).

Almost surely, 2^218653149 is an apocalyptic number.

It is an amenable number.

218653149 is a deficient number, since it is larger than the sum of its proper divisors (123853155).

218653149 is a wasteful number, since it uses less digits than its factorization.

218653149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509708.

The product of its digits is 51840, while the sum is 39.

The square root of 218653149 is about 14786.9249338732. The cubic root of 218653149 is about 602.4466292262.

The spelling of 218653149 in words is "two hundred eighteen million, six hundred fifty-three thousand, one hundred forty-nine".