231440214 has 32 divisors (see below), whose sum is σ = 484475904. Its totient is φ = 73568000.

The previous prime is 231440207. The next prime is 231440219. The reversal of 231440214 is 412044132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231440219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46339 + ... + 51089.

It is an arithmetic number, because the mean of its divisors is an integer number (15139872).

Almost surely, 2^231440214 is an apocalyptic number.

231440214 is an abundant number, since it is smaller than the sum of its proper divisors (253035690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231440214 is a wasteful number, since it uses less digits than its factorization.

231440214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5132.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 231440214 is about 15213.1592379755. The cubic root of 231440214 is about 613.9687602365.

Adding to 231440214 its reverse (412044132), we get a palindrome (643484346).

The spelling of 231440214 in words is "two hundred thirty-one million, four hundred forty thousand, two hundred fourteen".