168228419 has 4 divisors (see below), whose sum is σ = 168337344. Its totient is φ = 168119496.

The previous prime is 168228409. The next prime is 168228439. The reversal of 168228419 is 914822861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 914822861 = 23 ⋅39774907.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168228419 is a prime.

It is a super-2 number, since 2×168228419² = 56601601918479122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168228409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52112 + ... + 55245.

It is an arithmetic number, because the mean of its divisors is an integer number (42084336).

Almost surely, 2^168228419 is an apocalyptic number.

168228419 is a deficient number, since it is larger than the sum of its proper divisors (108925).

168228419 is a wasteful number, since it uses less digits than its factorization.

168228419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108924.

The product of its digits is 55296, while the sum is 41.

The square root of 168228419 is about 12970.2898579793. The cubic root of 168228419 is about 552.0347976996.

The spelling of 168228419 in words is "one hundred sixty-eight million, two hundred twenty-eight thousand, four hundred nineteen".