231317029 has 4 divisors (see below), whose sum is σ = 231678540. Its totient is φ = 230955520.

The previous prime is 231316999. The next prime is 231317101. The reversal of 231317029 is 920713132.

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 204432804 + 26884225 = 14298^2 + 5185^2 .

It is a cyclic number.

It is not a de Polignac number, because 231317029 - 2⁷ = 231316901 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231316988 and 231317006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231311029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179794 + ... + 181075.

It is an arithmetic number, because the mean of its divisors is an integer number (57919635).

Almost surely, 2^231317029 is an apocalyptic number.

It is an amenable number.

231317029 is a deficient number, since it is larger than the sum of its proper divisors (361511).

231317029 is an equidigital number, since it uses as much as digits as its factorization.

231317029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361510.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 231317029 is about 15209.1100660098. The cubic root of 231317029 is about 613.8598117773.

The spelling of 231317029 in words is "two hundred thirty-one million, three hundred seventeen thousand, twenty-nine".