214855022581 has 2 divisors, whose sum is σ = 214855022582. Its totient is φ = 214855022580.

The previous prime is 214855022561. The next prime is 214855022617. The reversal of 214855022581 is 185220558412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162517021956 + 52338000625 = 403134^2 + 228775^2 .

It is a cyclic number.

It is not a de Polignac number, because 214855022581 - 2⁷ = 214855022453 is a prime.

It is a super-2 number, since 2×214855022581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214855022521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107427511290 + 107427511291.

It is an arithmetic number, because the mean of its divisors is an integer number (107427511291).

Almost surely, 2^214855022581 is an apocalyptic number.

It is an amenable number.

214855022581 is a deficient number, since it is larger than the sum of its proper divisors (1).

214855022581 is an equidigital number, since it uses as much as digits as its factorization.

214855022581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256000, while the sum is 43.

The spelling of 214855022581 in words is "two hundred fourteen billion, eight hundred fifty-five million, twenty-two thousand, five hundred eighty-one".