221543155037745 has 32 divisors (see below), whose sum is σ = 398839997836800. Its totient is φ = 116660699356032.

The previous prime is 221543155037717. The next prime is 221543155037753. The reversal of 221543155037745 is 547730551345122.

221543155037745 is a `hidden beast` number, since 2 + 2 + 1 + 5 + 43 + 1 + 550 + 3 + 7 + 7 + 45 = 666.

221543155037745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-221543155037745 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221543155037691 and 221543155037700.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10386447612 + ... + 10386468941.

It is an arithmetic number, because the mean of its divisors is an integer number (12463749932400).

Almost surely, 2^{221543155037745} is an apocalyptic number.

It is an amenable number.

221543155037745 is a deficient number, since it is larger than the sum of its proper divisors (177296842799055).

221543155037745 is a wasteful number, since it uses less digits than its factorization.

221543155037745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20772916646 (or 20772916640 counting only the distinct ones).

The product of its (nonzero) digits is 17640000, while the sum is 54.

The spelling of 221543155037745 in words is "two hundred twenty-one trillion, five hundred forty-three billion, one hundred fifty-five million, thirty-seven thousand, seven hundred forty-five".