221675565373 has 2 divisors, whose sum is σ = 221675565374. Its totient is φ = 221675565372.

The previous prime is 221675565367. The next prime is 221675565409. The reversal of 221675565373 is 373565576122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184450493529 + 37225071844 = 429477^2 + 192938^2 .

It is a cyclic number.

It is not a de Polignac number, because 221675565373 - 2⁵ = 221675565341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221675565373.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221675565343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110837782686 + 110837782687.

It is an arithmetic number, because the mean of its divisors is an integer number (110837782687).

Almost surely, 2^221675565373 is an apocalyptic number.

It is an amenable number.

221675565373 is a deficient number, since it is larger than the sum of its proper divisors (1).

221675565373 is an equidigital number, since it uses as much as digits as its factorization.

221675565373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7938000, while the sum is 52.

The spelling of 221675565373 in words is "two hundred twenty-one billion, six hundred seventy-five million, five hundred sixty-five thousand, three hundred seventy-three".