221422644370551 has 8 divisors (see below), whose sum is σ = 317940207301360. Its totient is φ = 136260088843392.

The previous prime is 221422644370549. The next prime is 221422644370559. The reversal of 221422644370551 is 155073446224122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221422644370551 - 2¹ = 221422644370549 is a prime.

It is a super-3 number, since 3×221422644370551³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221422644370551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221422644370559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2838751850866 + ... + 2838751850943.

It is an arithmetic number, because the mean of its divisors is an integer number (39742525912670).

Almost surely, 2^{221422644370551} is an apocalyptic number.

221422644370551 is a deficient number, since it is larger than the sum of its proper divisors (96517562930809).

221422644370551 is a wasteful number, since it uses less digits than its factorization.

221422644370551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5677503701825.

The product of its (nonzero) digits is 3225600, while the sum is 48.

The spelling of 221422644370551 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, six hundred forty-four million, three hundred seventy thousand, five hundred fifty-one".