5219721578241 has 27 divisors (see below), whose sum is σ = 7685073321289. Its totient is φ = 3413919904512.

The previous prime is 5219721578233. The next prime is 5219721578257. The reversal of 5219721578241 is 1428751279125.

The square root of 5219721578241 is 2284671.

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

5219721578241 is a `hidden beast` number, since 5 + 2 + 1 + 9 + 7 + 21 + 578 + 2 + 41 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 560184887025 + 4659536691216 = 748455^2 + 2158596^2 .

It is not a de Polignac number, because 5219721578241 - 2³ = 5219721578233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5219721578041) 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, 363255505 + ... + 363269873.

Almost surely, 2^{5219721578241} is an apocalyptic number.

5219721578241 is the 2284671-st square number.

5219721578241 is the 1142336-th centered octagonal number.

It is an amenable number.

5219721578241 is a deficient number, since it is larger than the sum of its proper divisors (2465351743048).

5219721578241 is an frugal number, since it uses more digits than its factorization.

5219721578241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28850 (or 14425 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 54.

The spelling of 5219721578241 in words is "five trillion, two hundred nineteen billion, seven hundred twenty-one million, five hundred seventy-eight thousand, two hundred forty-one".