30163861 has 12 divisors (see below), whose sum is σ = 37788492. Its totient is φ = 23865408.

The previous prime is 30163841. The next prime is 30163867. The reversal of 30163861 is 16836103.

It can be written as a sum of positive squares in 2 ways, for example, as 3186225 + 26977636 = 1785^2 + 5194^2 .

It is not a de Polignac number, because 30163861 - 2¹⁹ = 29639573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30163867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23040 + ... + 24313.

It is an arithmetic number, because the mean of its divisors is an integer number (3149041).

Almost surely, 2^30163861 is an apocalyptic number.

It is an amenable number.

30163861 is a deficient number, since it is larger than the sum of its proper divisors (7624631).

30163861 is a wasteful number, since it uses less digits than its factorization.

30163861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47380 (or 47373 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 30163861 is about 5492.1635991656. The cubic root of 30163861 is about 311.2879506205.

Adding to 30163861 its reverse (16836103), we get a palindrome (46999964).

The spelling of 30163861 in words is "thirty million, one hundred sixty-three thousand, eight hundred sixty-one".