30385231 has 12 divisors (see below), whose sum is σ = 32250960. Its totient is φ = 28619360.

The previous prime is 30385213. The next prime is 30385247. The reversal of 30385231 is 13258303.

It is not a de Polignac number, because 30385231 - 2⁹ = 30384719 is a prime.

It is a super-2 number, since 2×30385231² = 1846524525846722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30385196 and 30385205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30385211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37155 + ... + 37963.

It is an arithmetic number, because the mean of its divisors is an integer number (2687580).

Almost surely, 2^30385231 is an apocalyptic number.

30385231 is a deficient number, since it is larger than the sum of its proper divisors (1865729).

30385231 is an equidigital number, since it uses as much as digits as its factorization.

30385231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926 (or 903 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 30385231 is about 5512.2800182864. The cubic root of 30385231 is about 312.0476005338.

The spelling of 30385231 in words is "thirty million, three hundred eighty-five thousand, two hundred thirty-one".