30706231 has 2 divisors, whose sum is σ = 30706232. Its totient is φ = 30706230.

The previous prime is 30706229. The next prime is 30706243. The reversal of 30706231 is 13260703.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30706231 - 2¹ = 30706229 is a prime.

It is a super-2 number, since 2×30706231² = 1885745244450722, which contains 22 as substring.

Together with 30706229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30706631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15353115 + 15353116.

It is an arithmetic number, because the mean of its divisors is an integer number (15353116).

Almost surely, 2^30706231 is an apocalyptic number.

30706231 is a deficient number, since it is larger than the sum of its proper divisors (1).

30706231 is an equidigital number, since it uses as much as digits as its factorization.

30706231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 30706231 is about 5541.3203300297. The cubic root of 30706231 is about 313.1426127970.

Adding to 30706231 its reverse (13260703), we get a palindrome (43966934).

The spelling of 30706231 in words is "thirty million, seven hundred six thousand, two hundred thirty-one".