214544049721 has 3 divisors (see below), whose sum is σ = 214544512911. Its totient is φ = 214543586532.

The previous prime is 214544049701. The next prime is 214544049737. The reversal of 214544049721 is 127940445412.

The square root of 214544049721 is 463189.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 114371799721 + 100172250000 = 338189^2 + 316500^2 .

It is not a de Polignac number, because 214544049721 - 2⁷ = 214544049593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (214544049701) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 231595 + ... + 694783.

It is an arithmetic number, because the mean of its divisors is an integer number (71514837637).

Almost surely, 2^214544049721 is an apocalyptic number.

214544049721 is the 463189-th square number.

214544049721 is the 231595-th centered octagonal number.

It is an amenable number.

214544049721 is a deficient number, since it is larger than the sum of its proper divisors (463190).

214544049721 is an frugal number, since it uses more digits than its factorization.

214544049721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926378 (or 463189 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 214544049721 in words is "two hundred fourteen billion, five hundred forty-four million, forty-nine thousand, seven hundred twenty-one".