1521331011 has 16 divisors (see below), whose sum is σ = 2287465600. Its totient is φ = 999081864.

The previous prime is 1521331001. The next prime is 1521331061. The reversal of 1521331011 is 1101331251.

It is not a de Polignac number, because 1521331011 - 2⁶ = 1521330947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1521331001) 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 in 15 ways as a sum of consecutive naturals, for example, 418681 + ... + 422298.

It is an arithmetic number, because the mean of its divisors is an integer number (142966600).

Almost surely, 2^1521331011 is an apocalyptic number.

1521331011 is a deficient number, since it is larger than the sum of its proper divisors (766134589).

1521331011 is an equidigital number, since it uses as much as digits as its factorization.

1521331011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841055 (or 841049 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 1521331011 is about 39004.2434999065. The cubic root of 1521331011 is about 1150.1149251245.

Adding to 1521331011 its reverse (1101331251), we get a palindrome (2622662262).

The spelling of 1521331011 in words is "one billion, five hundred twenty-one million, three hundred thirty-one thousand, eleven".