305030061 has 24 divisors (see below), whose sum is σ = 505764480. Its totient is φ = 173533536.

The previous prime is 305030057. The next prime is 305030083. The reversal of 305030061 is 160030503.

305030061 is a `hidden beast` number, since 305 + 0 + 300 + 61 = 666.

It is not a de Polignac number, because 305030061 - 2² = 305030057 is a prime.

It is a super-2 number, since 2×305030061² = 186086676227327442, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305030021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3856 + ... + 24998.

It is an arithmetic number, because the mean of its divisors is an integer number (21073520).

Almost surely, 2^305030061 is an apocalyptic number.

It is an amenable number.

305030061 is a deficient number, since it is larger than the sum of its proper divisors (200734419).

305030061 is a wasteful number, since it uses less digits than its factorization.

305030061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21385 (or 21382 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 305030061 is about 17465.1098192940. The cubic root of 305030061 is about 673.1536637623.

Adding to 305030061 its reverse (160030503), we get a palindrome (465060564).

The spelling of 305030061 in words is "three hundred five million, thirty thousand, sixty-one".