168551513227 has 2 divisors, whose sum is σ = 168551513228. Its totient is φ = 168551513226.

The previous prime is 168551513177. The next prime is 168551513257. The reversal of 168551513227 is 722315155861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168551513227 - 2²³ = 168543124619 is a prime.

It is a super-2 number, since 2×168551513227² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (168551513257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84275756613 + 84275756614.

It is an arithmetic number, because the mean of its divisors is an integer number (84275756614).

Almost surely, 2^168551513227 is an apocalyptic number.

168551513227 is a deficient number, since it is larger than the sum of its proper divisors (1).

168551513227 is an equidigital number, since it uses as much as digits as its factorization.

168551513227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504000, while the sum is 46.

The spelling of 168551513227 in words is "one hundred sixty-eight billion, five hundred fifty-one million, five hundred thirteen thousand, two hundred twenty-seven".