30130861 has 8 divisors (see below), whose sum is σ = 30621240. Its totient is φ = 29644032.

The previous prime is 30130843. The next prime is 30130921. The reversal of 30130861 is 16803103.

It can be written as a sum of positive squares in 4 ways, for example, as 4182025 + 25948836 = 2045^2 + 5094^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30130861 - 2⁵ = 30130829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30130361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20011 + ... + 21463.

It is an arithmetic number, because the mean of its divisors is an integer number (3827655).

Almost surely, 2^30130861 is an apocalyptic number.

It is an amenable number.

30130861 is a deficient number, since it is larger than the sum of its proper divisors (490379).

30130861 is a wasteful number, since it uses less digits than its factorization.

30130861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 30130861 is about 5489.1584965275. The cubic root of 30130861 is about 311.1743903265.

Adding to 30130861 its reverse (16803103), we get a palindrome (46933964).

The spelling of 30130861 in words is "thirty million, one hundred thirty thousand, eight hundred sixty-one".