214635382781 has 2 divisors, whose sum is σ = 214635382782. Its totient is φ = 214635382780.

The previous prime is 214635382721. The next prime is 214635382823. The reversal of 214635382781 is 187283536412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199639176100 + 14996206681 = 446810^2 + 122459^2 .

It is a cyclic number.

It is not a de Polignac number, because 214635382781 - 2²² = 214631188477 is a prime.

It is a super-2 number, since 2×214635382781² (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 (214635382721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107317691390 + 107317691391.

It is an arithmetic number, because the mean of its divisors is an integer number (107317691391).

Almost surely, 2^214635382781 is an apocalyptic number.

It is an amenable number.

214635382781 is a deficient number, since it is larger than the sum of its proper divisors (1).

214635382781 is an equidigital number, since it uses as much as digits as its factorization.

214635382781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 50.

The spelling of 214635382781 in words is "two hundred fourteen billion, six hundred thirty-five million, three hundred eighty-two thousand, seven hundred eighty-one".