6430181 has 4 divisors (see below), whose sum is σ = 6463692. Its totient is φ = 6396672.

The previous prime is 6430169. The next prime is 6430183. The reversal of 6430181 is 1810346.

6430181 is digitally balanced in base 3, 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 can be written as a sum of positive squares in 2 ways, for example, as 1768900 + 4661281 = 1330^2 + 2159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6430181 is a prime.

It is a super-2 number, since 2×6430181² = 82694455385522, 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 (6430183) 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, 16466 + ... + 16851.

It is an arithmetic number, because the mean of its divisors is an integer number (1615923).

Almost surely, 2^6430181 is an apocalyptic number.

It is an amenable number.

6430181 is a deficient number, since it is larger than the sum of its proper divisors (33511).

6430181 is a wasteful number, since it uses less digits than its factorization.

6430181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33510.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 6430181 is about 2535.7801560861. The cubic root of 6430181 is about 185.9549453443.

The spelling of 6430181 in words is "six million, four hundred thirty thousand, one hundred eighty-one".