168161530 has 16 divisors (see below), whose sum is σ = 302852520. Its totient is φ = 67228672.

The previous prime is 168161509. The next prime is 168161531. The reversal of 168161530 is 35161861.

168161530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 158030041 + 10131489 = 12571^2 + 3183^2 .

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 168161492 and 168161501.

It is not an unprimeable number, because it can be changed into a prime (168161531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23406 + ... + 29734.

Almost surely, 2^168161530 is an apocalyptic number.

168161530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168161530 is a deficient number, since it is larger than the sum of its proper divisors (134690990).

168161530 is a wasteful number, since it uses less digits than its factorization.

168161530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8993.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 168161530 is about 12967.7110547698. The cubic root of 168161530 is about 551.9616234785.

The spelling of 168161530 in words is "one hundred sixty-eight million, one hundred sixty-one thousand, five hundred thirty".