166033231 has 16 divisors (see below), whose sum is σ = 209337408. Its totient is φ = 128160000.

The previous prime is 166033223. The next prime is 166033243. The reversal of 166033231 is 132330661.

It is a cyclic number.

It is not a de Polignac number, because 166033231 - 2³ = 166033223 is a prime.

It is a super-2 number, since 2×166033231² = 55134067592598722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166033196 and 166033205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163033231) 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, 18520 + ... + 25981.

It is an arithmetic number, because the mean of its divisors is an integer number (13083588).

Almost surely, 2^166033231 is an apocalyptic number.

166033231 is a deficient number, since it is larger than the sum of its proper divisors (43304177).

166033231 is a wasteful number, since it uses less digits than its factorization.

166033231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44562.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 166033231 is about 12885.3882750967. The cubic root of 166033231 is about 549.6231368715.

Adding to 166033231 its reverse (132330661), we get a palindrome (298363892).

The spelling of 166033231 in words is "one hundred sixty-six million, thirty-three thousand, two hundred thirty-one".