256102529 has 2 divisors, whose sum is σ = 256102530. Its totient is φ = 256102528.

The previous prime is 256102499. The next prime is 256102531. The reversal of 256102529 is 925201652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152571904 + 103530625 = 12352^2 + 10175^2 .

It is a cyclic number.

It is not a de Polignac number, because 256102529 - 2¹⁶ = 256036993 is a prime.

Together with 256102531, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 256102495 and 256102504.

It is not a weakly prime, because it can be changed into another prime (256101529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128051264 + 128051265.

It is an arithmetic number, because the mean of its divisors is an integer number (128051265).

Almost surely, 2^256102529 is an apocalyptic number.

It is an amenable number.

256102529 is a deficient number, since it is larger than the sum of its proper divisors (1).

256102529 is an equidigital number, since it uses as much as digits as its factorization.

256102529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 256102529 is about 16003.2037105075. The cubic root of 256102529 is about 635.0451775161.

The spelling of 256102529 in words is "two hundred fifty-six million, one hundred two thousand, five hundred twenty-nine".