221604520250325 has 144 divisors (see below), whose sum is σ = 392187353402880. Its totient is φ = 110387864801280.

The previous prime is 221604520250287. The next prime is 221604520250387. The reversal of 221604520250325 is 523052025406122.

It is not a de Polignac number, because 221604520250325 - 2¹² = 221604520246229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1532155111 + ... + 1532299739.

It is an arithmetic number, because the mean of its divisors is an integer number (2723523287520).

Almost surely, 2^{221604520250325} is an apocalyptic number.

221604520250325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221604520250325 is a deficient number, since it is larger than the sum of its proper divisors (170582833152555).

221604520250325 is a wasteful number, since it uses less digits than its factorization.

221604520250325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145216 (or 145194 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 39.

Adding to 221604520250325 its reverse (523052025406122), we get a palindrome (744656545656447).

The spelling of 221604520250325 in words is "two hundred twenty-one trillion, six hundred four billion, five hundred twenty million, two hundred fifty thousand, three hundred twenty-five".