214933671721 has 4 divisors (see below), whose sum is σ = 215542549332. Its totient is φ = 214324794112.

The previous prime is 214933671697. The next prime is 214933671749. The reversal of 214933671721 is 127176339412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 170143875225 + 44789796496 = 412485^2 + 211636^2 .

It is a cyclic number.

It is not a de Polignac number, because 214933671721 - 2¹⁷ = 214933540649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (214933674721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304438276 + ... + 304438981.

It is an arithmetic number, because the mean of its divisors is an integer number (53885637333).

Almost surely, 2^214933671721 is an apocalyptic number.

It is an amenable number.

214933671721 is a deficient number, since it is larger than the sum of its proper divisors (608877611).

214933671721 is an equidigital number, since it uses as much as digits as its factorization.

214933671721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608877610.

The product of its digits is 381024, while the sum is 46.

The spelling of 214933671721 in words is "two hundred fourteen billion, nine hundred thirty-three million, six hundred seventy-one thousand, seven hundred twenty-one".