231404222 has 8 divisors (see below), whose sum is σ = 396692976. Its totient is φ = 99173232.

The previous prime is 231404209. The next prime is 231404269. The reversal of 231404222 is 222404132.

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

It is a junction number, because it is equal to n+sod(n) for n = 231404194 and 231404203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8264423 + ... + 8264450.

It is an arithmetic number, because the mean of its divisors is an integer number (49586622).

Almost surely, 2^231404222 is an apocalyptic number.

231404222 is a deficient number, since it is larger than the sum of its proper divisors (165288754).

231404222 is a wasteful number, since it uses less digits than its factorization.

231404222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16528882.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 231404222 is about 15211.9762687167. The cubic root of 231404222 is about 613.9369318450.

Adding to 231404222 its reverse (222404132), we get a palindrome (453808354).

The spelling of 231404222 in words is "two hundred thirty-one million, four hundred four thousand, two hundred twenty-two".