1530152521 has 2 divisors, whose sum is σ = 1530152522. Its totient is φ = 1530152520.

The previous prime is 1530152509. The next prime is 1530152527. The reversal of 1530152521 is 1252510351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1521858121 + 8294400 = 39011^2 + 2880^2 .

It is a cyclic number.

It is not a de Polignac number, because 1530152521 - 2¹⁵ = 1530119753 is a prime.

It is not a weakly prime, because it can be changed into another prime (1530152527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765076260 + 765076261.

It is an arithmetic number, because the mean of its divisors is an integer number (765076261).

Almost surely, 2^1530152521 is an apocalyptic number.

It is an amenable number.

1530152521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1530152521 is an equidigital number, since it uses as much as digits as its factorization.

1530152521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1530152521 is about 39117.1640204144. The cubic root of 1530152521 is about 1152.3336408335. Note that the first 3 decimals are identical.

Adding to 1530152521 its reverse (1252510351), we get a palindrome (2782662872).

The spelling of 1530152521 in words is "one billion, five hundred thirty million, one hundred fifty-two thousand, five hundred twenty-one".