30191501 has 2 divisors, whose sum is σ = 30191502. Its totient is φ = 30191500.

The previous prime is 30191471. The next prime is 30191521. The reversal of 30191501 is 10519103.

It is an a-pointer prime, because the next prime (30191521) can be obtained adding 30191501 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30085225 + 106276 = 5485^2 + 326^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30191501 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30191521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15095750 + 15095751.

It is an arithmetic number, because the mean of its divisors is an integer number (15095751).

Almost surely, 2^30191501 is an apocalyptic number.

It is an amenable number.

30191501 is a deficient number, since it is larger than the sum of its proper divisors (1).

30191501 is an equidigital number, since it uses as much as digits as its factorization.

30191501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 135, while the sum is 20.

The square root of 30191501 is about 5494.6793355027. The cubic root of 30191501 is about 311.3830022483.

The spelling of 30191501 in words is "thirty million, one hundred ninety-one thousand, five hundred one".