256102258 has 8 divisors (see below), whose sum is σ = 387678060. Its totient is φ = 126876240.

The previous prime is 256102247. The next prime is 256102267. The reversal of 256102258 is 852201652.

It can be written as a sum of positive squares in 2 ways, for example, as 247024089 + 9078169 = 15717^2 + 3013^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×256102258³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

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, 587173 + ... + 587608.

Almost surely, 2^256102258 is an apocalyptic number.

256102258 is a deficient number, since it is larger than the sum of its proper divisors (131575802).

256102258 is a wasteful number, since it uses less digits than its factorization.

256102258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174892.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 256102258 is about 16003.1952434506. The cubic root of 256102258 is about 635.0449535208.

The spelling of 256102258 in words is "two hundred fifty-six million, one hundred two thousand, two hundred fifty-eight".