231222819 has 8 divisors (see below), whose sum is σ = 310366800. Its totient is φ = 153113696.

The previous prime is 231222793. The next prime is 231222839. The reversal of 231222819 is 918222132.

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

It is a cyclic number.

It is not a de Polignac number, because 231222819 - 2⁵ = 231222787 is a prime.

It is a super-2 number, since 2×231222819² = 106927984052613522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231222839) 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 7 ways as a sum of consecutive naturals, for example, 258192 + ... + 259085.

It is an arithmetic number, because the mean of its divisors is an integer number (38795850).

Almost surely, 2^231222819 is an apocalyptic number.

231222819 is a deficient number, since it is larger than the sum of its proper divisors (79143981).

231222819 is a wasteful number, since it uses less digits than its factorization.

231222819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517429.

The product of its digits is 3456, while the sum is 30.

The square root of 231222819 is about 15206.0125937078. The cubic root of 231222819 is about 613.7764635603.

The spelling of 231222819 in words is "two hundred thirty-one million, two hundred twenty-two thousand, eight hundred nineteen".