221431416334573 has 2 divisors, whose sum is σ = 221431416334574. Its totient is φ = 221431416334572.

The previous prime is 221431416334571. The next prime is 221431416334613. The reversal of 221431416334573 is 375433614134122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220518134121609 + 913282212964 = 14849853^2 + 955658^2 .

It is a cyclic number.

It is not a de Polignac number, because 221431416334573 - 2¹ = 221431416334571 is a prime.

Together with 221431416334571, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221431416334571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110715708167286 + 110715708167287.

It is an arithmetic number, because the mean of its divisors is an integer number (110715708167287).

Almost surely, 2^{221431416334573} is an apocalyptic number.

It is an amenable number.

221431416334573 is a deficient number, since it is larger than the sum of its proper divisors (1).

221431416334573 is an equidigital number, since it uses as much as digits as its factorization.

221431416334573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 49.

The spelling of 221431416334573 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, four hundred sixteen million, three hundred thirty-four thousand, five hundred seventy-three".