1521534523 has 2 divisors, whose sum is σ = 1521534524. Its totient is φ = 1521534522.

The previous prime is 1521534463. The next prime is 1521534533. The reversal of 1521534523 is 3254351251.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1521534523 is a prime.

It is not a weakly prime, because it can be changed into another prime (1521534533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760767261 + 760767262.

It is an arithmetic number, because the mean of its divisors is an integer number (760767262).

Almost surely, 2^1521534523 is an apocalyptic number.

1521534523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521534523 is an equidigital number, since it uses as much as digits as its factorization.

1521534523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 31.

The square root of 1521534523 is about 39006.8522570074. The cubic root of 1521534523 is about 1150.1662073572.

Adding to 1521534523 its reverse (3254351251), we get a palindrome (4775885774).

The spelling of 1521534523 in words is "one billion, five hundred twenty-one million, five hundred thirty-four thousand, five hundred twenty-three".