30161139 has 4 divisors (see below), whose sum is σ = 40214856. Its totient is φ = 20107424.

The previous prime is 30161129. The next prime is 30161141. The reversal of 30161139 is 93116103.

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 30161139 - 2⁴ = 30161123 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (30161129) 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, 5026854 + ... + 5026859.

It is an arithmetic number, because the mean of its divisors is an integer number (10053714).

Almost surely, 2^30161139 is an apocalyptic number.

30161139 is a deficient number, since it is larger than the sum of its proper divisors (10053717).

30161139 is a wasteful number, since it uses less digits than its factorization.

30161139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10053716.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 30161139 is about 5491.9157859530. The cubic root of 30161139 is about 311.2785867520.

The spelling of 30161139 in words is "thirty million, one hundred sixty-one thousand, one hundred thirty-nine".