231069 has 4 divisors (see below), whose sum is σ = 308096. Its totient is φ = 154044.

The previous prime is 231067. The next prime is 231079. The reversal of 231069 is 960132.

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 not a de Polignac number, because 231069 - 2¹ = 231067 is a prime.

It is a super-2 number, since 2×231069² = 106785765522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231067) 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, 38509 + ... + 38514.

It is an arithmetic number, because the mean of its divisors is an integer number (77024).

2²³¹⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

231069 is a deficient number, since it is larger than the sum of its proper divisors (77027).

231069 is an equidigital number, since it uses as much as digits as its factorization.

231069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77026.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 231069 is about 480.6963698636. The cubic root of 231069 is about 61.3640330190.

The spelling of 231069 in words is "two hundred thirty-one thousand, sixty-nine".