30161243 has 4 divisors (see below), whose sum is σ = 34470000. Its totient is φ = 25852488.

The previous prime is 30161231. The next prime is 30161249. The reversal of 30161243 is 34216103.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30161243 - 2¹⁸ = 29899099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30161249) 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, 2154368 + ... + 2154381.

It is an arithmetic number, because the mean of its divisors is an integer number (8617500).

Almost surely, 2^30161243 is an apocalyptic number.

30161243 is a deficient number, since it is larger than the sum of its proper divisors (4308757).

30161243 is an equidigital number, since it uses as much as digits as its factorization.

30161243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4308756.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 30161243 is about 5491.9252544076. The cubic root of 30161243 is about 311.2789445295.

Adding to 30161243 its reverse (34216103), we get a palindrome (64377346).

The spelling of 30161243 in words is "thirty million, one hundred sixty-one thousand, two hundred forty-three".