221525113254564 has 48 divisors (see below), whose sum is σ = 603302436108288. Its totient is φ = 61946232276768.

The previous prime is 221525113254547. The next prime is 221525113254593. The reversal of 221525113254564 is 465452311525122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28055354874 + ... + 28055362769.

It is an arithmetic number, because the mean of its divisors is an integer number (12568800752256).

Almost surely, 2^{221525113254564} is an apocalyptic number.

It is an amenable number.

221525113254564 is an abundant number, since it is smaller than the sum of its proper divisors (381777322853724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221525113254564 is a wasteful number, since it uses less digits than its factorization.

221525113254564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56110717704 (or 56110717702 counting only the distinct ones).

The product of its digits is 2880000, while the sum is 48.

Adding to 221525113254564 its reverse (465452311525122), we get a palindrome (686977424779686).

The spelling of 221525113254564 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-four".