166143219 has 16 divisors (see below), whose sum is σ = 242014080. Its totient is φ = 100546560.

The previous prime is 166143179. The next prime is 166143221. The reversal of 166143219 is 912341661.

It is not a de Polignac number, because 166143219 - 2¹² = 166139123 is a prime.

It is a super-2 number, since 2×166143219² = 55207138439363922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 166143219.

It is not an unprimeable number, because it can be changed into a prime (166143259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22104 + ... + 28650.

It is an arithmetic number, because the mean of its divisors is an integer number (15125880).

Almost surely, 2^166143219 is an apocalyptic number.

166143219 is a deficient number, since it is larger than the sum of its proper divisors (75870861).

166143219 is a wasteful number, since it uses less digits than its factorization.

166143219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7330.

The product of its digits is 7776, while the sum is 33.

The square root of 166143219 is about 12889.6555035424. The cubic root of 166143219 is about 549.7444752434.

The spelling of 166143219 in words is "one hundred sixty-six million, one hundred forty-three thousand, two hundred nineteen".