219214049209 has 9 divisors (see below), whose sum is σ = 221926344879. Its totient is φ = 216534523440.

The previous prime is 219214049189. The next prime is 219214049269. The reversal of 219214049209 is 902940412912.

The square root of 219214049209 is 468203.

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

It can be written as a sum of positive squares in only one way, i.e., 216734009209 + 2480040000 = 465547^2 + 49800^2 .

It is a de Polignac number, because none of the positive numbers 2^k-219214049209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219214049269) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 38858029 + ... + 38863669.

Almost surely, 2^219214049209 is an apocalyptic number.

219214049209 is the 468203-rd square number.

219214049209 is the 234102-nd centered octagonal number.

It is an amenable number.

219214049209 is a deficient number, since it is larger than the sum of its proper divisors (2712295670).

219214049209 is an frugal number, since it uses more digits than its factorization.

219214049209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11448 (or 5724 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 219214049209 in words is "two hundred nineteen billion, two hundred fourteen million, forty-nine thousand, two hundred nine".