1521441013 has 4 divisors (see below), whose sum is σ = 1540699840. Its totient is φ = 1502182188.

The previous prime is 1521441011. The next prime is 1521441029. The reversal of 1521441013 is 3101441251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3101441251 = 13619 ⋅227729.

It is a cyclic number.

It is not a de Polignac number, because 1521441013 - 2¹ = 1521441011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521441011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9629295 + ... + 9629452.

It is an arithmetic number, because the mean of its divisors is an integer number (385174960).

Almost surely, 2^1521441013 is an apocalyptic number.

It is an amenable number.

1521441013 is a deficient number, since it is larger than the sum of its proper divisors (19258827).

1521441013 is an equidigital number, since it uses as much as digits as its factorization.

1521441013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19258826.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1521441013 is about 39005.6536030355. The cubic root of 1521441013 is about 1150.1426446876.

Adding to 1521441013 its reverse (3101441251), we get a palindrome (4622882264).

The spelling of 1521441013 in words is "one billion, five hundred twenty-one million, four hundred forty-one thousand, thirteen".