219517945235044 has 81 divisors (see below), whose sum is σ = 393851733044889. Its totient is φ = 107056672023840.

The previous prime is 219517945235003. The next prime is 219517945235047. The reversal of 219517945235044 is 440532549715912.

The square root of 219517945235044 is 14816138.

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., 433187748900 + 219084757486144 = 658170^2 + 14801512^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219517945235047) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 216700833882 + ... + 216700834894.

Almost surely, 2^{219517945235044} is an apocalyptic number.

219517945235044 is the 14816138-th square number.

It is an amenable number.

219517945235044 is a deficient number, since it is larger than the sum of its proper divisors (174333787809845).

219517945235044 is an frugal number, since it uses more digits than its factorization.

219517945235044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2378 (or 1189 counting only the distinct ones).

The product of its (nonzero) digits is 54432000, while the sum is 61.

The spelling of 219517945235044 in words is "two hundred nineteen trillion, five hundred seventeen billion, nine hundred forty-five million, two hundred thirty-five thousand, forty-four".