221180416725 has 12 divisors (see below), whose sum is σ = 365684955776. Its totient is φ = 117962888880.

The previous prime is 221180416679. The next prime is 221180416753. The reversal of 221180416725 is 527614081122.

It is not a de Polignac number, because 221180416725 - 2²⁰ = 221179368149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1474536037 + ... + 1474536186.

Almost surely, 2^221180416725 is an apocalyptic number.

221180416725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221180416725 is a deficient number, since it is larger than the sum of its proper divisors (144504539051).

221180416725 is a wasteful number, since it uses less digits than its factorization.

221180416725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2949072236 (or 2949072231 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

Adding to 221180416725 its reverse (527614081122), we get a palindrome (748794497847).

The spelling of 221180416725 in words is "two hundred twenty-one billion, one hundred eighty million, four hundred sixteen thousand, seven hundred twenty-five".