221345622534541 has 4 divisors (see below), whose sum is σ = 221602106454912. Its totient is φ = 221089138614172.

The previous prime is 221345622534529. The next prime is 221345622534571. The reversal of 221345622534541 is 145435226543122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221345622534541 - 2¹¹ = 221345622532493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221345622534571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128241958891 + ... + 128241960616.

It is an arithmetic number, because the mean of its divisors is an integer number (55400526613728).

Almost surely, 2^{221345622534541} is an apocalyptic number.

It is an amenable number.

221345622534541 is a deficient number, since it is larger than the sum of its proper divisors (256483920371).

221345622534541 is an equidigital number, since it uses as much as digits as its factorization.

221345622534541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256483920370.

The product of its digits is 6912000, while the sum is 49.

The spelling of 221345622534541 in words is "two hundred twenty-one trillion, three hundred forty-five billion, six hundred twenty-two million, five hundred thirty-four thousand, five hundred forty-one".