257230823 has 4 divisors (see below), whose sum is σ = 257295480. Its totient is φ = 257166168.

The previous prime is 257230817. The next prime is 257230829. The reversal of 257230823 is 328032752.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (257230817) and next prime (257230829).

It is a cyclic number.

It is not a de Polignac number, because 257230823 - 2¹⁰ = 257229799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 257230823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257230829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25940 + ... + 34457.

It is an arithmetic number, because the mean of its divisors is an integer number (64323870).

Almost surely, 2^257230823 is an apocalyptic number.

257230823 is a deficient number, since it is larger than the sum of its proper divisors (64657).

257230823 is an equidigital number, since it uses as much as digits as its factorization.

257230823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64656.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 257230823 is about 16038.4170977064. The cubic root of 257230823 is about 635.9764035060.

The spelling of 257230823 in words is "two hundred fifty-seven million, two hundred thirty thousand, eight hundred twenty-three".