221752745206403 has 16 divisors (see below), whose sum is σ = 225449374840320. Its totient is φ = 218058101308800.

The previous prime is 221752745206381. The next prime is 221752745206427. The reversal of 221752745206403 is 304602547257122.

221752745206403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 221752745206403 - 2³⁸ = 221477867299459 is a prime.

It is a super-3 number, since 3×221752745206403³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221752745206453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7451604638 + ... + 7451634396.

It is an arithmetic number, because the mean of its divisors is an integer number (14090585927520).

Almost surely, 2^{221752745206403} is an apocalyptic number.

221752745206403 is a deficient number, since it is larger than the sum of its proper divisors (3696629633917).

221752745206403 is a wasteful number, since it uses less digits than its factorization.

221752745206403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58958.

The product of its (nonzero) digits is 5644800, while the sum is 50.

The spelling of 221752745206403 in words is "two hundred twenty-one trillion, seven hundred fifty-two billion, seven hundred forty-five million, two hundred six thousand, four hundred three".