30221613809 has 2 divisors, whose sum is σ = 30221613810. Its totient is φ = 30221613808.

The previous prime is 30221613803. The next prime is 30221613811. The reversal of 30221613809 is 90831612203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28509309409 + 1712304400 = 168847^2 + 41380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30221613809 is a prime.

Together with 30221613811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30221613803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15110806904 + 15110806905.

It is an arithmetic number, because the mean of its divisors is an integer number (15110806905).

Almost surely, 2^30221613809 is an apocalyptic number.

It is an amenable number.

30221613809 is a deficient number, since it is larger than the sum of its proper divisors (1).

30221613809 is an equidigital number, since it uses as much as digits as its factorization.

30221613809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 30221613809 in words is "thirty billion, two hundred twenty-one million, six hundred thirteen thousand, eight hundred nine".