214256339681 has 2 divisors, whose sum is σ = 214256339682. Its totient is φ = 214256339680.

The previous prime is 214256339677. The next prime is 214256339747. The reversal of 214256339681 is 186933652412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193080269281 + 21176070400 = 439409^2 + 145520^2 .

It is a cyclic number.

It is not a de Polignac number, because 214256339681 - 2² = 214256339677 is a prime.

It is a super-3 number, since 3×214256339681³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (214256339081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107128169840 + 107128169841.

It is an arithmetic number, because the mean of its divisors is an integer number (107128169841).

Almost surely, 2^214256339681 is an apocalyptic number.

It is an amenable number.

214256339681 is a deficient number, since it is larger than the sum of its proper divisors (1).

214256339681 is an equidigital number, since it uses as much as digits as its factorization.

214256339681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 50.

The spelling of 214256339681 in words is "two hundred fourteen billion, two hundred fifty-six million, three hundred thirty-nine thousand, six hundred eighty-one".