231220214 has 4 divisors (see below), whose sum is σ = 346830324. Its totient is φ = 115610106.

The previous prime is 231220193. The next prime is 231220217. The reversal of 231220214 is 412022132.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 231220192 and 231220201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231220217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57805052 + ... + 57805055.

It is an arithmetic number, because the mean of its divisors is an integer number (86707581).

Almost surely, 2^231220214 is an apocalyptic number.

231220214 is a deficient number, since it is larger than the sum of its proper divisors (115610110).

231220214 is a wasteful number, since it uses less digits than its factorization.

231220214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115610109.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 231220214 is about 15205.9269365600. The cubic root of 231220214 is about 613.7741585777.

Adding to 231220214 its reverse (412022132), we get a palindrome (643242346).

The spelling of 231220214 in words is "two hundred thirty-one million, two hundred twenty thousand, two hundred fourteen".