6551431 has 4 divisors (see below), whose sum is σ = 6711264. Its totient is φ = 6391600.

The previous prime is 6551429. The next prime is 6551497. The reversal of 6551431 is 1341556.

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 6551431 - 2¹ = 6551429 is a prime.

It is a super-2 number, since 2×6551431² = 85842496295522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6551396 and 6551405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6551411) 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, 79855 + ... + 79936.

It is an arithmetic number, because the mean of its divisors is an integer number (1677816).

Almost surely, 2^6551431 is an apocalyptic number.

6551431 is a deficient number, since it is larger than the sum of its proper divisors (159833).

6551431 is a wasteful number, since it uses less digits than its factorization.

6551431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159832.

The product of its digits is 1800, while the sum is 25.

The square root of 6551431 is about 2559.5763321300. The cubic root of 6551431 is about 187.1164878033.

Adding to 6551431 its reverse (1341556), we get a palindrome (7892987).

The spelling of 6551431 in words is "six million, five hundred fifty-one thousand, four hundred thirty-one".