221544001051 has 8 divisors (see below), whose sum is σ = 221832387504. Its totient is φ = 221255796960.

The previous prime is 221544001013. The next prime is 221544001067. The reversal of 221544001051 is 150100445122.

221544001051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221544001051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221544001351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2475556 + ... + 2563486.

It is an arithmetic number, because the mean of its divisors is an integer number (27729048438).

Almost surely, 2^221544001051 is an apocalyptic number.

221544001051 is a deficient number, since it is larger than the sum of its proper divisors (288386453).

221544001051 is a wasteful number, since it uses less digits than its factorization.

221544001051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91181.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 221544001051 its reverse (150100445122), we get a palindrome (371644446173).

The spelling of 221544001051 in words is "two hundred twenty-one billion, five hundred forty-four million, one thousand, fifty-one".