30003161 has 4 divisors (see below), whose sum is σ = 30300324. Its totient is φ = 29706000.

The previous prime is 30003157. The next prime is 30003187. The reversal of 30003161 is 16130003.

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 29637136 + 366025 = 5444^2 + 605^2 .

It is a cyclic number.

It is not a de Polignac number, because 30003161 - 2² = 30003157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30003101) 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, 148430 + ... + 148631.

It is an arithmetic number, because the mean of its divisors is an integer number (7575081).

Almost surely, 2^30003161 is an apocalyptic number.

It is an amenable number.

30003161 is a deficient number, since it is larger than the sum of its proper divisors (297163).

30003161 is a wasteful number, since it uses less digits than its factorization.

30003161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297162.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 30003161 is about 5477.5141259517. The cubic root of 30003161 is about 310.7341635032.

Adding to 30003161 its reverse (16130003), we get a palindrome (46133164).

The spelling of 30003161 in words is "thirty million, three thousand, one hundred sixty-one".