231218201 has 4 divisors (see below), whose sum is σ = 243387600. Its totient is φ = 219048804.

The previous prime is 231218191. The next prime is 231218203. The reversal of 231218201 is 102812132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231218201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231218203) 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, 6084671 + ... + 6084708.

It is an arithmetic number, because the mean of its divisors is an integer number (60846900).

Almost surely, 2^231218201 is an apocalyptic number.

It is an amenable number.

231218201 is a deficient number, since it is larger than the sum of its proper divisors (12169399).

231218201 is a wasteful number, since it uses less digits than its factorization.

231218201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12169398.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 231218201 is about 15205.8607451206. The cubic root of 231218201 is about 613.7723774028.

The spelling of 231218201 in words is "two hundred thirty-one million, two hundred eighteen thousand, two hundred one".