256010261 has 8 divisors (see below), whose sum is σ = 282115680. Its totient is φ = 230820912.

The previous prime is 256010243. The next prime is 256010267. The reversal of 256010261 is 162010652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256010261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256010267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228431 + ... + 229548.

It is an arithmetic number, because the mean of its divisors is an integer number (35264460).

Almost surely, 2^256010261 is an apocalyptic number.

It is an amenable number.

256010261 is a deficient number, since it is larger than the sum of its proper divisors (26105419).

256010261 is a wasteful number, since it uses less digits than its factorization.

256010261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458035.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 256010261 is about 16000.3206530369. The cubic root of 256010261 is about 634.9689041751.

It can be divided in two parts, 2560 and 10261, that added together give a palindrome (12821).

The spelling of 256010261 in words is "two hundred fifty-six million, ten thousand, two hundred sixty-one".