Search a number
-
+
256212113 is a prime number
BaseRepresentation
bin11110100010101…
…11110010010001
3122212002220221112
433101113302101
51011042241423
641231303105
76230524043
oct1721276221
9585086845
10256212113
11121696a53
127197aa95
1341109101
1426055a93
151775ea78
hexf457c91

256212113 has 2 divisors, whose sum is σ = 256212114. Its totient is φ = 256212112.

The previous prime is 256212109. The next prime is 256212137. The reversal of 256212113 is 311212652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236913664 + 19298449 = 15392^2 + 4393^2 .

It is a cyclic number.

It is not a de Polignac number, because 256212113 - 22 = 256212109 is a prime.

It is equal to p14000459 and since 256212113 and 14000459 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (256212413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128106056 + 128106057.

It is an arithmetic number, because the mean of its divisors is an integer number (128106057).

Almost surely, 2256212113 is an apocalyptic number.

It is an amenable number.

256212113 is a deficient number, since it is larger than the sum of its proper divisors (1).

256212113 is an equidigital number, since it uses as much as digits as its factorization.

256212113 is an odious number, because the sum of its binary digits is odd.

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

The square root of 256212113 is about 16006.6271587740. The cubic root of 256212113 is about 635.1357413326.

Adding to 256212113 its reverse (311212652), we get a palindrome (567424765).

The spelling of 256212113 in words is "two hundred fifty-six million, two hundred twelve thousand, one hundred thirteen".