231418 has 16 divisors (see below), whose sum is σ = 386784. Its totient is φ = 102960.

The previous prime is 231409. The next prime is 231419. The reversal of 231418 is 814132.

It is a junction number, because it is equal to n+sod(n) for n = 231395 and 231404.

It is not an unprimeable number, because it can be changed into a prime (231419) 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, 1396 + ... + 1552.

It is an arithmetic number, because the mean of its divisors is an integer number (24174).

2²³¹⁴¹⁸ is an apocalyptic number.

231418 is a deficient number, since it is larger than the sum of its proper divisors (155366).

231418 is a wasteful number, since it uses less digits than its factorization.

231418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237.

The product of its digits is 192, while the sum is 19.

The square root of 231418 is about 481.0592479103. The cubic root of 231418 is about 61.3949116375.

It can be divided in two parts, 2314 and 18, that added together give a palindrome (2332).

The spelling of 231418 in words is "two hundred thirty-one thousand, four hundred eighteen".