168452213 has 4 divisors (see below), whose sum is σ = 174260940. Its totient is φ = 162643488.

The previous prime is 168452177. The next prime is 168452227. The reversal of 168452213 is 312254861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69588964 + 98863249 = 8342^2 + 9943^2 .

It is a cyclic number.

It is not a de Polignac number, because 168452213 - 2¹⁰ = 168451189 is a prime.

It is a super-2 number, since 2×168452213² = 56752296129194738, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168452213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168452413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2904320 + ... + 2904377.

It is an arithmetic number, because the mean of its divisors is an integer number (43565235).

Almost surely, 2^168452213 is an apocalyptic number.

It is an amenable number.

168452213 is a deficient number, since it is larger than the sum of its proper divisors (5808727).

168452213 is an equidigital number, since it uses as much as digits as its factorization.

168452213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5808726.

The product of its digits is 11520, while the sum is 32.

The square root of 168452213 is about 12978.9141687585. The cubic root of 168452213 is about 552.2794795714.

The spelling of 168452213 in words is "one hundred sixty-eight million, four hundred fifty-two thousand, two hundred thirteen".