231348569 has 2 divisors, whose sum is σ = 231348570. Its totient is φ = 231348568.

The previous prime is 231348517. The next prime is 231348581. The reversal of 231348569 is 965843132.

231348569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180768025 + 50580544 = 13445^2 + 7112^2 .

It is a cyclic number.

It is not a de Polignac number, because 231348569 - 2²⁴ = 214571353 is a prime.

It is a super-2 number, since 2×231348569² = 107044320756695522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231342569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115674284 + 115674285.

It is an arithmetic number, because the mean of its divisors is an integer number (115674285).

Almost surely, 2^231348569 is an apocalyptic number.

It is an amenable number.

231348569 is a deficient number, since it is larger than the sum of its proper divisors (1).

231348569 is an equidigital number, since it uses as much as digits as its factorization.

231348569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 231348569 is about 15210.1469092182. The cubic root of 231348569 is about 613.8877103698.

The spelling of 231348569 in words is "two hundred thirty-one million, three hundred forty-eight thousand, five hundred sixty-nine".