Base | Representation |
---|---|
bin | 11100001001010111… |
… | …111001110001001101 |
3 | 2220000020002021221122 |
4 | 130021113321301031 |
5 | 443343320010244 |
6 | 21514523010325 |
7 | 2116634014214 |
oct | 341127716115 |
9 | 86006067848 |
10 | 30222031949 |
11 | 118a9604a0a |
12 | 5a353699a5 |
13 | 2b08394655 |
14 | 1669b2407b |
15 | bbd3861ee |
hex | 7095f9c4d |
30222031949 has 2 divisors, whose sum is σ = 30222031950. Its totient is φ = 30222031948.
The previous prime is 30222031919. The next prime is 30222031951. The reversal of 30222031949 is 94913022203.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 26886160900 + 3335871049 = 163970^2 + 57757^2 .
It is an emirp because it is prime and its reverse (94913022203) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 30222031949 - 216 = 30221966413 is a prime.
Together with 30222031951, it forms a pair of twin primes.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (30222031919) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15111015974 + 15111015975.
It is an arithmetic number, because the mean of its divisors is an integer number (15111015975).
Almost surely, 230222031949 is an apocalyptic number.
It is an amenable number.
30222031949 is a deficient number, since it is larger than the sum of its proper divisors (1).
30222031949 is an equidigital number, since it uses as much as digits as its factorization.
30222031949 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 23328, while the sum is 35.
The spelling of 30222031949 in words is "thirty billion, two hundred twenty-two million, thirty-one thousand, nine hundred forty-nine".
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