172230521971 has 2 divisors, whose sum is σ = 172230521972. Its totient is φ = 172230521970.

The previous prime is 172230521887. The next prime is 172230522007. The reversal of 172230521971 is 179125032271.

172230521971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172230521971 - 2⁷ = 172230521843 is a prime.

It is a super-2 number, since 2×172230521971² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (172230321971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86115260985 + 86115260986.

It is an arithmetic number, because the mean of its divisors is an integer number (86115260986).

Almost surely, 2^172230521971 is an apocalyptic number.

172230521971 is a deficient number, since it is larger than the sum of its proper divisors (1).

172230521971 is an equidigital number, since it uses as much as digits as its factorization.

172230521971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 40.

The spelling of 172230521971 in words is "one hundred seventy-two billion, two hundred thirty million, five hundred twenty-one thousand, nine hundred seventy-one".