30161073 has 16 divisors (see below), whose sum is σ = 43413120. Its totient is φ = 18568704.

The previous prime is 30161069. The next prime is 30161099. The reversal of 30161073 is 37016103.

It is not a de Polignac number, because 30161073 - 2² = 30161069 is a prime.

It is a super-2 number, since 2×30161073² = 1819380649022658, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30160073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5536 + ... + 9537.

It is an arithmetic number, because the mean of its divisors is an integer number (2713320).

Almost surely, 2^30161073 is an apocalyptic number.

It is an amenable number.

30161073 is a deficient number, since it is larger than the sum of its proper divisors (13252047).

30161073 is a wasteful number, since it uses less digits than its factorization.

30161073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15128.

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 30161073 is about 5491.9097771176. The cubic root of 30161073 is about 311.2783597004.

Adding to 30161073 its reverse (37016103), we get a palindrome (67177176).

The spelling of 30161073 in words is "thirty million, one hundred sixty-one thousand, seventy-three".