166025231 has 4 divisors (see below), whose sum is σ = 167237232. Its totient is φ = 164813232.

The previous prime is 166025207. The next prime is 166025311. The reversal of 166025231 is 132520661.

166025231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 166025231 - 2¹⁰ = 166024207 is a prime.

It is a super-2 number, since 2×166025231² = 55128754657206722, 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 166025231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166025131) 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, 605795 + ... + 606068.

It is an arithmetic number, because the mean of its divisors is an integer number (41809308).

Almost surely, 2^166025231 is an apocalyptic number.

166025231 is a deficient number, since it is larger than the sum of its proper divisors (1212001).

166025231 is a wasteful number, since it uses less digits than its factorization.

166025231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212000.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 166025231 is about 12885.0778422173. The cubic root of 166025231 is about 549.6143092096.

Adding to 166025231 its reverse (132520661), we get a palindrome (298545892).

The spelling of 166025231 in words is "one hundred sixty-six million, twenty-five thousand, two hundred thirty-one".