171224872573 has 2 divisors, whose sum is σ = 171224872574. Its totient is φ = 171224872572.

The previous prime is 171224872549. The next prime is 171224872589. The reversal of 171224872573 is 375278422171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170426131929 + 798740644 = 412827^2 + 28262^2 .

It is a cyclic number.

It is not a de Polignac number, because 171224872573 - 2⁵ = 171224872541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171224872073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85612436286 + 85612436287.

It is an arithmetic number, because the mean of its divisors is an integer number (85612436287).

Almost surely, 2^171224872573 is an apocalyptic number.

It is an amenable number.

171224872573 is a deficient number, since it is larger than the sum of its proper divisors (1).

171224872573 is an equidigital number, since it uses as much as digits as its factorization.

171224872573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1317120, while the sum is 49.

The spelling of 171224872573 in words is "one hundred seventy-one billion, two hundred twenty-four million, eight hundred seventy-two thousand, five hundred seventy-three".