1521313032343 has 4 divisors (see below), whose sum is σ = 1638337111768. Its totient is φ = 1404288952920.

The previous prime is 1521313032341. The next prime is 1521313032383. The reversal of 1521313032343 is 3432303131251.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1521313032343 - 2¹ = 1521313032341 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 (1521313032341) 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, 58512039693 + ... + 58512039718.

It is an arithmetic number, because the mean of its divisors is an integer number (409584277942).

Almost surely, 2^{1521313032343} is an apocalyptic number.

1521313032343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1521313032343 is a deficient number, since it is larger than the sum of its proper divisors (117024079425).

1521313032343 is a wasteful number, since it uses less digits than its factorization.

1521313032343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117024079424.

The product of its (nonzero) digits is 19440, while the sum is 31.

Adding to 1521313032343 its reverse (3432303131251), we get a palindrome (4953616163594).

The spelling of 1521313032343 in words is "one trillion, five hundred twenty-one billion, three hundred thirteen million, thirty-two thousand, three hundred forty-three".