1530227381 has 2 divisors, whose sum is σ = 1530227382. Its totient is φ = 1530227380.

The previous prime is 1530227359. The next prime is 1530227383. The reversal of 1530227381 is 1837220351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1324304881 + 205922500 = 36391^2 + 14350^2 .

It is an emirp because it is prime and its reverse (1837220351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1530227381 - 2⁶ = 1530227317 is a prime.

It is a super-2 number, since 2×1530227381² = 4683191675124238322, which contains 22 as substring.

Together with 1530227383, 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 (1530227383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765113690 + 765113691.

It is an arithmetic number, because the mean of its divisors is an integer number (765113691).

Almost surely, 2^1530227381 is an apocalyptic number.

It is an amenable number.

1530227381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1530227381 is an equidigital number, since it uses as much as digits as its factorization.

1530227381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1530227381 is about 39118.1208776700. The cubic root of 1530227381 is about 1152.3524324874.

The spelling of 1530227381 in words is "one billion, five hundred thirty million, two hundred twenty-seven thousand, three hundred eighty-one".