221432747403541 has 2 divisors, whose sum is σ = 221432747403542. Its totient is φ = 221432747403540.

The previous prime is 221432747403529. The next prime is 221432747403547. The reversal of 221432747403541 is 145304747234122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180232074902916 + 41200672500625 = 13425054^2 + 6418775^2 .

It is a cyclic number.

It is not a de Polignac number, because 221432747403541 - 2⁵ = 221432747403509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221432747403547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110716373701770 + 110716373701771.

It is an arithmetic number, because the mean of its divisors is an integer number (110716373701771).

Almost surely, 2^{221432747403541} is an apocalyptic number.

It is an amenable number.

221432747403541 is a deficient number, since it is larger than the sum of its proper divisors (1).

221432747403541 is an equidigital number, since it uses as much as digits as its factorization.

221432747403541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4515840, while the sum is 49.

The spelling of 221432747403541 in words is "two hundred twenty-one trillion, four hundred thirty-two billion, seven hundred forty-seven million, four hundred three thousand, five hundred forty-one".