218255641 has 8 divisors (see below), whose sum is σ = 229975200. Its totient is φ = 206559360.

The previous prime is 218255629. The next prime is 218255651. The reversal of 218255641 is 146552812.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218255641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 218255597 and 218255606.

It is not an unprimeable number, because it can be changed into a prime (218255651) 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, 15465 + ... + 25993.

It is an arithmetic number, because the mean of its divisors is an integer number (28746900).

Almost surely, 2^218255641 is an apocalyptic number.

It is an amenable number.

218255641 is a deficient number, since it is larger than the sum of its proper divisors (11719559).

218255641 is a wasteful number, since it uses less digits than its factorization.

218255641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11639.

The product of its digits is 19200, while the sum is 34.

The square root of 218255641 is about 14773.4776203844. The cubic root of 218255641 is about 602.0813282543.

The spelling of 218255641 in words is "two hundred eighteen million, two hundred fifty-five thousand, six hundred forty-one".