221533606250751 has 16 divisors (see below), whose sum is σ = 297013045198688. Its totient is φ = 146871635443200.

The previous prime is 221533606250699. The next prime is 221533606250767. The reversal of 221533606250751 is 157052606335122.

It is not a de Polignac number, because 221533606250751 - 2²⁷ = 221533472033023 is a prime.

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 221533606250751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221533606250791) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 53508171 + ... + 57499491.

It is an arithmetic number, because the mean of its divisors is an integer number (18563315324918).

Almost surely, 2^{221533606250751} is an apocalyptic number.

221533606250751 is a deficient number, since it is larger than the sum of its proper divisors (75479438947937).

221533606250751 is a wasteful number, since it uses less digits than its factorization.

221533606250751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4093722.

The product of its (nonzero) digits is 2268000, while the sum is 48.

The spelling of 221533606250751 in words is "two hundred twenty-one trillion, five hundred thirty-three billion, six hundred six million, two hundred fifty thousand, seven hundred fifty-one".