221143633325 has 48 divisors (see below), whose sum is σ = 282626107200. Its totient is φ = 171580147200.

The previous prime is 221143633313. The next prime is 221143633327. The reversal of 221143633325 is 523336341122.

It is not a de Polignac number, because 221143633325 - 2³⁴ = 203963764141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221143633327) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68655215 + ... + 68658435.

It is an arithmetic number, because the mean of its divisors is an integer number (5888043900).

Almost surely, 2^221143633325 is an apocalyptic number.

221143633325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221143633325 is a deficient number, since it is larger than the sum of its proper divisors (61482473875).

221143633325 is a wasteful number, since it uses less digits than its factorization.

221143633325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3902 (or 3897 counting only the distinct ones).

The product of its digits is 77760, while the sum is 35.

Adding to 221143633325 its reverse (523336341122), we get a palindrome (744479974447).

The spelling of 221143633325 in words is "two hundred twenty-one billion, one hundred forty-three million, six hundred thirty-three thousand, three hundred twenty-five".