6557431 has 4 divisors (see below), whose sum is σ = 6631200. Its totient is φ = 6483664.

The previous prime is 6557429. The next prime is 6557459. The reversal of 6557431 is 1347556.

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 6557431 - 2¹ = 6557429 is a prime.

It is a super-2 number, since 2×6557431² = 85999802639522, 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 = 6557393 and 6557402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6557401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36751 + ... + 36928.

It is an arithmetic number, because the mean of its divisors is an integer number (1657800).

Almost surely, 2^6557431 is an apocalyptic number.

6557431 is a deficient number, since it is larger than the sum of its proper divisors (73769).

6557431 is an equidigital number, since it uses as much as digits as its factorization.

6557431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73768.

The product of its digits is 12600, while the sum is 31.

The square root of 6557431 is about 2560.7481328705. The cubic root of 6557431 is about 187.1735926998.

The spelling of 6557431 in words is "six million, five hundred fifty-seven thousand, four hundred thirty-one".