538291563 has 16 divisors (see below), whose sum is σ = 750919680. Its totient is φ = 342345344.

The previous prime is 538291549. The next prime is 538291597. The reversal of 538291563 is 365192835.

It is a cyclic number.

It is not a de Polignac number, because 538291563 - 2⁵ = 538291531 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (538291063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16243 + ... + 36611.

It is an arithmetic number, because the mean of its divisors is an integer number (46932480).

Almost surely, 2^538291563 is an apocalyptic number.

538291563 is a deficient number, since it is larger than the sum of its proper divisors (212628117).

538291563 is a wasteful number, since it uses less digits than its factorization.

538291563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20778.

The product of its digits is 194400, while the sum is 42.

The square root of 538291563 is about 23201.1112449382. Note that the first 3 decimals coincide. The cubic root of 538291563 is about 813.4655978164.

The spelling of 538291563 in words is "five hundred thirty-eight million, two hundred ninety-one thousand, five hundred sixty-three".