256115061 has 16 divisors (see below), whose sum is σ = 382204800. Its totient is φ = 169494624.

The previous prime is 256115023. The next prime is 256115063. The reversal of 256115061 is 160511652.

It is a happy number.

It is not a de Polignac number, because 256115061 - 2¹⁴ = 256098677 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256115063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30921 + ... + 38318.

It is an arithmetic number, because the mean of its divisors is an integer number (23887800).

Almost surely, 2^256115061 is an apocalyptic number.

It is an amenable number.

256115061 is a deficient number, since it is larger than the sum of its proper divisors (126089739).

256115061 is a wasteful number, since it uses less digits than its factorization.

256115061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69385 (or 69379 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 256115061 is about 16003.5952523175. The cubic root of 256115061 is about 635.0555356806.

The spelling of 256115061 in words is "two hundred fifty-six million, one hundred fifteen thousand, sixty-one".