6443232551 has 4 divisors (see below), whose sum is σ = 7363694352. Its totient is φ = 5522770752.

The previous prime is 6443232487. The next prime is 6443232553. The reversal of 6443232551 is 1552323446.

6443232551 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6443232551 - 2⁶ = 6443232487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6443232553) 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, 460230890 + ... + 460230903.

It is an arithmetic number, because the mean of its divisors is an integer number (1840923588).

Almost surely, 2^6443232551 is an apocalyptic number.

6443232551 is a deficient number, since it is larger than the sum of its proper divisors (920461801).

6443232551 is an equidigital number, since it uses as much as digits as its factorization.

6443232551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920461800.

The product of its digits is 86400, while the sum is 35.

The square root of 6443232551 is about 80269.7486666054. The cubic root of 6443232551 is about 1860.8067328507.

Adding to 6443232551 its reverse (1552323446), we get a palindrome (7995555997).

The spelling of 6443232551 in words is "six billion, four hundred forty-three million, two hundred thirty-two thousand, five hundred fifty-one".