30031249 has 2 divisors, whose sum is σ = 30031250. Its totient is φ = 30031248.

The previous prime is 30031247. The next prime is 30031259. The reversal of 30031249 is 94213003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28890625 + 1140624 = 5375^2 + 1068^2 .

It is a cyclic number.

It is not a de Polignac number, because 30031249 - 2¹ = 30031247 is a prime.

Together with 30031247, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30031247) 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, 15015624 + 15015625.

It is an arithmetic number, because the mean of its divisors is an integer number (15015625).

Almost surely, 2^30031249 is an apocalyptic number.

It is an amenable number.

30031249 is a deficient number, since it is larger than the sum of its proper divisors (1).

30031249 is an equidigital number, since it uses as much as digits as its factorization.

30031249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 30031249 is about 5480.0774629562. The cubic root of 30031249 is about 310.8310997227.

The spelling of 30031249 in words is "thirty million, thirty-one thousand, two hundred forty-nine".