30040261 has 2 divisors, whose sum is σ = 30040262. Its totient is φ = 30040260.

The previous prime is 30040253. The next prime is 30040267. The reversal of 30040261 is 16204003.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22372900 + 7667361 = 4730^2 + 2769^2 .

It is an emirp because it is prime and its reverse (16204003) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30040261 - 2³ = 30040253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30040267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15020130 + 15020131.

It is an arithmetic number, because the mean of its divisors is an integer number (15020131).

Almost surely, 2^30040261 is an apocalyptic number.

It is an amenable number.

30040261 is a deficient number, since it is larger than the sum of its proper divisors (1).

30040261 is an equidigital number, since it uses as much as digits as its factorization.

30040261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 30040261 is about 5480.8996524293. The cubic root of 30040261 is about 310.8621887806.

Adding to 30040261 its reverse (16204003), we get a palindrome (46244264).

The spelling of 30040261 in words is "thirty million, forty thousand, two hundred sixty-one".