206030181 has 16 divisors (see below), whose sum is σ = 324777600. Its totient is φ = 113671488.

The previous prime is 206030147. The next prime is 206030219. The reversal of 206030181 is 181030602.

206030181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 206030181 - 2⁹ = 206029669 is a prime.

It is a super-2 number, since 2×206030181² = 84896870965785522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206030101) 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, 168546 + ... + 169763.

It is an arithmetic number, because the mean of its divisors is an integer number (20298600).

Almost surely, 2^206030181 is an apocalyptic number.

206030181 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

206030181 is a deficient number, since it is larger than the sum of its proper divisors (118747419).

206030181 is a wasteful number, since it uses less digits than its factorization.

206030181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338348.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 206030181 is about 14353.7514608551. The cubic root of 206030181 is about 590.6228995418.

Adding to 206030181 its reverse (181030602), we get a palindrome (387060783).

The spelling of 206030181 in words is "two hundred six million, thirty thousand, one hundred eighty-one".