6413432521 has 4 divisors (see below), whose sum is σ = 6415804432. Its totient is φ = 6411060612.

The previous prime is 6413432507. The next prime is 6413432527. The reversal of 6413432521 is 1252343146.

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.

It is a cyclic number.

It is not a de Polignac number, because 6413432521 - 2¹¹ = 6413430473 is a prime.

It is a super-2 number, since 2×6413432521² = 82264233402840830882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6413432527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181895 + ... + 1187308.

It is an arithmetic number, because the mean of its divisors is an integer number (1603951108).

Almost surely, 2^6413432521 is an apocalyptic number.

It is an amenable number.

6413432521 is a deficient number, since it is larger than the sum of its proper divisors (2371911).

6413432521 is a wasteful number, since it uses less digits than its factorization.

6413432521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371910.

The product of its digits is 17280, while the sum is 31.

The square root of 6413432521 is about 80083.9092514845. The cubic root of 6413432521 is about 1857.9335474199.

Adding to 6413432521 its reverse (1252343146), we get a palindrome (7665775667).

The spelling of 6413432521 in words is "six billion, four hundred thirteen million, four hundred thirty-two thousand, five hundred twenty-one".