221525113254563 has 4 divisors (see below), whose sum is σ = 221533034229120. Its totient is φ = 221517192280008.

The previous prime is 221525113254547. The next prime is 221525113254593. The reversal of 221525113254563 is 365452311525122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221525113254563 - 2⁴ = 221525113254547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221525113254593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3960445328 + ... + 3960501261.

It is an arithmetic number, because the mean of its divisors is an integer number (55383258557280).

Almost surely, 2^{221525113254563} is an apocalyptic number.

221525113254563 is a deficient number, since it is larger than the sum of its proper divisors (7920974557).

221525113254563 is an equidigital number, since it uses as much as digits as its factorization.

221525113254563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7920974556.

The product of its digits is 2160000, while the sum is 47.

Adding to 221525113254563 its reverse (365452311525122), we get a palindrome (586977424779685).

The spelling of 221525113254563 in words is "two hundred twenty-one trillion, five hundred twenty-five billion, one hundred thirteen million, two hundred fifty-four thousand, five hundred sixty-three".