256527149 has 2 divisors, whose sum is σ = 256527150. Its totient is φ = 256527148.

The previous prime is 256527109. The next prime is 256527163. The reversal of 256527149 is 941725652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229674025 + 26853124 = 15155^2 + 5182^2 .

It is a cyclic number.

It is not a de Polignac number, because 256527149 - 2¹² = 256523053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256527109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128263574 + 128263575.

It is an arithmetic number, because the mean of its divisors is an integer number (128263575).

Almost surely, 2^256527149 is an apocalyptic number.

It is an amenable number.

256527149 is a deficient number, since it is larger than the sum of its proper divisors (1).

256527149 is an equidigital number, since it uses as much as digits as its factorization.

256527149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 41.

The square root of 256527149 is about 16016.4649345603. The cubic root of 256527149 is about 635.3959536845.

The spelling of 256527149 in words is "two hundred fifty-six million, five hundred twenty-seven thousand, one hundred forty-nine".