221445043513 has 2 divisors, whose sum is σ = 221445043514. Its totient is φ = 221445043512.

The previous prime is 221445043489. The next prime is 221445043541. The reversal of 221445043513 is 315340544122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221039141904 + 405901609 = 470148^2 + 20147^2 .

It is a cyclic number.

It is not a de Polignac number, because 221445043513 - 2⁵ = 221445043481 is a prime.

It is not a weakly prime, because it can be changed into another prime (221445043553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110722521756 + 110722521757.

It is an arithmetic number, because the mean of its divisors is an integer number (110722521757).

Almost surely, 2^221445043513 is an apocalyptic number.

It is an amenable number.

221445043513 is a deficient number, since it is larger than the sum of its proper divisors (1).

221445043513 is an equidigital number, since it uses as much as digits as its factorization.

221445043513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 221445043513 its reverse (315340544122), we get a palindrome (536785587635).

The spelling of 221445043513 in words is "two hundred twenty-one billion, four hundred forty-five million, forty-three thousand, five hundred thirteen".