231222929 has 4 divisors (see below), whose sum is σ = 264254784. Its totient is φ = 198191076.

The previous prime is 231222923. The next prime is 231223019. The reversal of 231222929 is 929222132.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231222929 - 2¹² = 231218833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231222895 and 231222904.

It is not an unprimeable number, because it can be changed into a prime (231222923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16515917 + ... + 16515930.

It is an arithmetic number, because the mean of its divisors is an integer number (66063696).

Almost surely, 2^231222929 is an apocalyptic number.

It is an amenable number.

231222929 is a deficient number, since it is larger than the sum of its proper divisors (33031855).

231222929 is an equidigital number, since it uses as much as digits as its factorization.

231222929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33031854.

The product of its digits is 7776, while the sum is 32.

The square root of 231222929 is about 15206.0162106977. The cubic root of 231222929 is about 613.7765608912.

The spelling of 231222929 in words is "two hundred thirty-one million, two hundred twenty-two thousand, nine hundred twenty-nine".