166241213 has 4 divisors (see below), whose sum is σ = 166447008. Its totient is φ = 166035420.

The previous prime is 166241197. The next prime is 166241233. The reversal of 166241213 is 312142661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312142661 = 17 ⋅18361333.

It is a cyclic number.

It is not a de Polignac number, because 166241213 - 2⁴ = 166241197 is a prime.

It is a super-2 number, since 2×166241213² = 55272281799422738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166241233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101681 + ... + 103302.

It is an arithmetic number, because the mean of its divisors is an integer number (41611752).

Almost surely, 2^166241213 is an apocalyptic number.

It is an amenable number.

166241213 is a deficient number, since it is larger than the sum of its proper divisors (205795).

166241213 is an equidigital number, since it uses as much as digits as its factorization.

166241213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205794.

The product of its digits is 1728, while the sum is 26.

The square root of 166241213 is about 12893.4562084803. The cubic root of 166241213 is about 549.8525367750.

Adding to 166241213 its reverse (312142661), we get a palindrome (478383874).

It can be divided in two parts, 1662 and 41213, that added together give a cube (42875 = 35³).

The spelling of 166241213 in words is "one hundred sixty-six million, two hundred forty-one thousand, two hundred thirteen".