219472573441 has 9 divisors (see below), whose sum is σ = 241244112963. Its totient is φ = 199515836520.

The previous prime is 219472573381. The next prime is 219472573447. The reversal of 219472573441 is 144375274912.

The square root of 219472573441 is 468479.

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., 27996317041 + 191476256400 = 167321^2 + 437580^2 .

It is a de Polignac number, because none of the positive numbers 2^k-219472573441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219472573447) 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, 5131975 + ... + 5174563.

Almost surely, 2^219472573441 is an apocalyptic number.

219472573441 is the 468479-th square number.

219472573441 is the 234240-th centered octagonal number.

It is an amenable number.

219472573441 is a deficient number, since it is larger than the sum of its proper divisors (21771539522).

219472573441 is an frugal number, since it uses more digits than its factorization.

219472573441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85200 (or 42600 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 49.

Multiplying 219472573441 by its sum of digits (49), we get a square (10754156098609 = 3279353²).

The spelling of 219472573441 in words is "two hundred nineteen billion, four hundred seventy-two million, five hundred seventy-three thousand, four hundred forty-one".