231256849 has 4 divisors (see below), whose sum is σ = 231312564. Its totient is φ = 231201136.

The previous prime is 231256819. The next prime is 231256871. The reversal of 231256849 is 948652132.

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 111682624 + 119574225 = 10568^2 + 10935^2 .

It is a cyclic number.

It is not a de Polignac number, because 231256849 - 2⁷ = 231256721 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231256819) 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 3 ways as a sum of consecutive naturals, for example, 21082 + ... + 30115.

It is an arithmetic number, because the mean of its divisors is an integer number (57828141).

Almost surely, 2^231256849 is an apocalyptic number.

It is an amenable number.

231256849 is a deficient number, since it is larger than the sum of its proper divisors (55715).

231256849 is an equidigital number, since it uses as much as digits as its factorization.

231256849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55714.

The product of its digits is 103680, while the sum is 40.

The square root of 231256849 is about 15207.1315178110. The cubic root of 231256849 is about 613.8065727403.

The spelling of 231256849 in words is "two hundred thirty-one million, two hundred fifty-six thousand, eight hundred forty-nine".