221431550104 has 8 divisors (see below), whose sum is σ = 415184156460. Its totient is φ = 110715775048.

The previous prime is 221431550101. The next prime is 221431550113. The reversal of 221431550104 is 401055134122.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221431550101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13839471874 + ... + 13839471889.

Almost surely, 2^221431550104 is an apocalyptic number.

It is an amenable number.

221431550104 is a deficient number, since it is larger than the sum of its proper divisors (193752606356).

221431550104 is a wasteful number, since it uses less digits than its factorization.

221431550104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27678943769 (or 27678943765 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 221431550104 its reverse (401055134122), we get a palindrome (622486684226).

The spelling of 221431550104 in words is "two hundred twenty-one billion, four hundred thirty-one million, five hundred fifty thousand, one hundred four".