30542819 has 2 divisors, whose sum is σ = 30542820. Its totient is φ = 30542818.

The previous prime is 30542807. The next prime is 30542833. The reversal of 30542819 is 91824503.

It is a weak prime.

It is an emirp because it is prime and its reverse (91824503) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30542819 - 2⁴ = 30542803 is a prime.

It is a super-2 number, since 2×30542819² = 1865727584933522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30542849) 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, 15271409 + 15271410.

It is an arithmetic number, because the mean of its divisors is an integer number (15271410).

Almost surely, 2^30542819 is an apocalyptic number.

30542819 is a deficient number, since it is larger than the sum of its proper divisors (1).

30542819 is an equidigital number, since it uses as much as digits as its factorization.

30542819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 30542819 is about 5526.5557990488. Note that the first 3 decimals coincide. The cubic root of 30542819 is about 312.5861317780.

The spelling of 30542819 in words is "thirty million, five hundred forty-two thousand, eight hundred nineteen".