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256216241 = 673824123
BaseRepresentation
bin11110100010110…
…00110010110001
3122212010010121102
433101120302301
51011042404431
641231334145
76230542061
oct1721306261
9585103542
10256216241
1112169a066
1271981355
134110ac58
14260573a1
1517760dcb
hexf458cb1

256216241 has 4 divisors (see below), whose sum is σ = 260040432. Its totient is φ = 252392052.

The previous prime is 256216237. The next prime is 256216249. The reversal of 256216241 is 142612652.

256216241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 256216241 - 22 = 256216237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (256216249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1911995 + ... + 1912128.

It is an arithmetic number, because the mean of its divisors is an integer number (65010108).

Almost surely, 2256216241 is an apocalyptic number.

It is an amenable number.

256216241 is a deficient number, since it is larger than the sum of its proper divisors (3824191).

256216241 is an equidigital number, since it uses as much as digits as its factorization.

256216241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3824190.

The product of its digits is 5760, while the sum is 29.

The square root of 256216241 is about 16006.7561048452. The cubic root of 256216241 is about 635.1391523426.

Adding to 256216241 its reverse (142612652), we get a palindrome (398828893).

The spelling of 256216241 in words is "two hundred fifty-six million, two hundred sixteen thousand, two hundred forty-one".

Divisors: 1 67 3824123 256216241