221225144355 has 64 divisors (see below), whose sum is σ = 406497208320. Its totient is φ = 114084834048.

The previous prime is 221225144347. The next prime is 221225144381. The reversal of 221225144355 is 553441522122.

221225144355 is a `hidden beast` number, since 2 + 2 + 12 + 251 + 44 + 355 = 666.

It is not a de Polignac number, because 221225144355 - 2³ = 221225144347 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 316599 + ... + 736671.

It is an arithmetic number, because the mean of its divisors is an integer number (6351518880).

Almost surely, 2^221225144355 is an apocalyptic number.

221225144355 is a deficient number, since it is larger than the sum of its proper divisors (185272063965).

221225144355 is a wasteful number, since it uses less digits than its factorization.

221225144355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420217 (or 420211 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

Adding to 221225144355 its reverse (553441522122), we get a palindrome (774666666477).

The spelling of 221225144355 in words is "two hundred twenty-one billion, two hundred twenty-five million, one hundred forty-four thousand, three hundred fifty-five".