256252165 has 12 divisors (see below), whose sum is σ = 332977284. Its totient is φ = 189231744.

The previous prime is 256252151. The next prime is 256252187. The reversal of 256252165 is 561252652.

It can be written as a sum of positive squares in 6 ways, for example, as 101324356 + 154927809 = 10066^2 + 12447^2 .

It is not a de Polignac number, because 256252165 - 2¹¹ = 256250117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256252165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150784 + ... + 152473.

It is an arithmetic number, because the mean of its divisors is an integer number (27748107).

Almost surely, 2^256252165 is an apocalyptic number.

It is an amenable number.

256252165 is a deficient number, since it is larger than the sum of its proper divisors (76725119).

256252165 is a wasteful number, since it uses less digits than its factorization.

256252165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303288 (or 303275 counting only the distinct ones).

The product of its digits is 36000, while the sum is 34.

The square root of 256252165 is about 16007.8782166782. The cubic root of 256252165 is about 635.1688351769.

The spelling of 256252165 in words is "two hundred fifty-six million, two hundred fifty-two thousand, one hundred sixty-five".