1528030381 has 2 divisors, whose sum is σ = 1528030382. Its totient is φ = 1528030380.

The previous prime is 1528030337. The next prime is 1528030421. The reversal of 1528030381 is 1830308251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1013148900 + 514881481 = 31830^2 + 22691^2 .

It is an emirp because it is prime and its reverse (1830308251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1528030381 - 2⁹ = 1528029869 is a prime.

It is a super-2 number, since 2×1528030381² = 4669753690518010322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1528000381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 764015190 + 764015191.

It is an arithmetic number, because the mean of its divisors is an integer number (764015191).

Almost surely, 2^1528030381 is an apocalyptic number.

It is an amenable number.

1528030381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1528030381 is an equidigital number, since it uses as much as digits as its factorization.

1528030381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1528030381 is about 39090.0291762490. The cubic root of 1528030381 is about 1151.8006776920.

The spelling of 1528030381 in words is "one billion, five hundred twenty-eight million, thirty thousand, three hundred eighty-one".