30161231 has 2 divisors, whose sum is σ = 30161232. Its totient is φ = 30161230.

The previous prime is 30161207. The next prime is 30161249. The reversal of 30161231 is 13216103.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30161231 - 2⁶ = 30161167 is a prime.

It is a super-2 number, since 2×30161231² = 1819399710870722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30161431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15080615 + 15080616.

It is an arithmetic number, because the mean of its divisors is an integer number (15080616).

Almost surely, 2^30161231 is an apocalyptic number.

30161231 is a deficient number, since it is larger than the sum of its proper divisors (1).

30161231 is an equidigital number, since it uses as much as digits as its factorization.

30161231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 30161231 is about 5491.9241618944. The cubic root of 30161231 is about 311.2789032475.

Adding to 30161231 its reverse (13216103), we get a palindrome (43377334).

The spelling of 30161231 in words is "thirty million, one hundred sixty-one thousand, two hundred thirty-one".