230191257 has 4 divisors (see below), whose sum is σ = 306921680. Its totient is φ = 153460836.

The previous prime is 230191249. The next prime is 230191277. The reversal of 230191257 is 752191032.

230191257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 230191257 - 2³ = 230191249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (230191207) 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, 38365207 + ... + 38365212.

It is an arithmetic number, because the mean of its divisors is an integer number (76730420).

Almost surely, 2^230191257 is an apocalyptic number.

It is an amenable number.

230191257 is a deficient number, since it is larger than the sum of its proper divisors (76730423).

230191257 is an equidigital number, since it uses as much as digits as its factorization.

230191257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76730422.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 230191257 is about 15172.0551343580. The cubic root of 230191257 is about 612.8623490829.

The spelling of 230191257 in words is "two hundred thirty million, one hundred ninety-one thousand, two hundred fifty-seven".