231146222 has 4 divisors (see below), whose sum is σ = 346719336. Its totient is φ = 115573110.

The previous prime is 231146219. The next prime is 231146239. The reversal of 231146222 is 222641132.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57786554 + ... + 57786557.

It is an arithmetic number, because the mean of its divisors is an integer number (86679834).

Almost surely, 2^231146222 is an apocalyptic number.

231146222 is a deficient number, since it is larger than the sum of its proper divisors (115573114).

231146222 is a wasteful number, since it uses less digits than its factorization.

231146222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115573113.

The product of its digits is 1152, while the sum is 23.

The square root of 231146222 is about 15203.4937432157. The cubic root of 231146222 is about 613.7086809941.

Adding to 231146222 its reverse (222641132), we get a palindrome (453787354).

The spelling of 231146222 in words is "two hundred thirty-one million, one hundred forty-six thousand, two hundred twenty-two".