231229105 has 4 divisors (see below), whose sum is σ = 277474932. Its totient is φ = 184983280.

The previous prime is 231229099. The next prime is 231229123. The reversal of 231229105 is 501922132.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 142850304 + 88378801 = 11952^2 + 9401^2 .

It is not a de Polignac number, because 231229105 - 2²¹ = 229131953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231229105.

It is an unprimeable number.

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, 23122906 + ... + 23122915.

It is an arithmetic number, because the mean of its divisors is an integer number (69368733).

Almost surely, 2^231229105 is an apocalyptic number.

It is an amenable number.

231229105 is a deficient number, since it is larger than the sum of its proper divisors (46245827).

231229105 is an equidigital number, since it uses as much as digits as its factorization.

231229105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46245826.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 231229105 is about 15206.2192868576. The cubic root of 231229105 is about 613.7820255314.

The spelling of 231229105 in words is "two hundred thirty-one million, two hundred twenty-nine thousand, one hundred five".