221533733006446 has 64 divisors (see below), whose sum is σ = 405977240125440. Its totient is φ = 88550841708000.

The previous prime is 221533733006329. The next prime is 221533733006459. The reversal of 221533733006446 is 644600337335122.

It is a self number, because there is not a number n which added to its sum of digits gives 221533733006446.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4562491 + ... + 21537961.

It is an arithmetic number, because the mean of its divisors is an integer number (6343394376960).

Almost surely, 2^{221533733006446} is an apocalyptic number.

221533733006446 is a deficient number, since it is larger than the sum of its proper divisors (184443507118994).

221533733006446 is a wasteful number, since it uses less digits than its factorization.

221533733006446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16976261.

The product of its (nonzero) digits is 6531840, while the sum is 49.

The spelling of 221533733006446 in words is "two hundred twenty-one trillion, five hundred thirty-three billion, seven hundred thirty-three million, six thousand, four hundred forty-six".