258170243 has 2 divisors, whose sum is σ = 258170244. Its totient is φ = 258170242.

The previous prime is 258170197. The next prime is 258170257. The reversal of 258170243 is 342071852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 258170243 - 2⁶ = 258170179 is a prime.

It is not a weakly prime, because it can be changed into another prime (258170543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129085121 + 129085122.

It is an arithmetic number, because the mean of its divisors is an integer number (129085122).

Almost surely, 2^258170243 is an apocalyptic number.

258170243 is a deficient number, since it is larger than the sum of its proper divisors (1).

258170243 is an equidigital number, since it uses as much as digits as its factorization.

258170243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 258170243 is about 16067.6769633946. The cubic root of 258170243 is about 636.7496689509.

The spelling of 258170243 in words is "two hundred fifty-eight million, one hundred seventy thousand, two hundred forty-three".