256252187 has 2 divisors, whose sum is σ = 256252188. Its totient is φ = 256252186.

The previous prime is 256252151. The next prime is 256252189. The reversal of 256252187 is 781252652.

256252187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256252187 - 2⁶ = 256252123 is a prime.

Together with 256252189, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256252187.

It is not a weakly prime, because it can be changed into another prime (256252189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128126093 + 128126094.

It is an arithmetic number, because the mean of its divisors is an integer number (128126094).

Almost surely, 2^256252187 is an apocalyptic number.

256252187 is a deficient number, since it is larger than the sum of its proper divisors (1).

256252187 is an equidigital number, since it uses as much as digits as its factorization.

256252187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 38.

The square root of 256252187 is about 16007.8789038398. The cubic root of 256252187 is about 635.1688533539.

The spelling of 256252187 in words is "two hundred fifty-six million, two hundred fifty-two thousand, one hundred eighty-seven".