256205061 has 12 divisors (see below), whose sum is σ = 422941792. Its totient is φ = 146402856.

The previous prime is 256205041. The next prime is 256205077. The reversal of 256205061 is 160502652.

It is not a de Polignac number, because 256205061 - 2⁶ = 256204997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256205041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2033311 + ... + 2033436.

Almost surely, 2^256205061 is an apocalyptic number.

256205061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

256205061 is a deficient number, since it is larger than the sum of its proper divisors (166736731).

256205061 is a wasteful number, since it uses less digits than its factorization.

256205061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066760 (or 4066757 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 256205061 is about 16006.4068734991. The cubic root of 256205061 is about 635.1299141057.

The spelling of 256205061 in words is "two hundred fifty-six million, two hundred five thousand, sixty-one".