555431 has 4 divisors (see below), whose sum is σ = 568392. Its totient is φ = 542472.

The previous prime is 555421. The next prime is 555439. The reversal of 555431 is 134555.

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 555431 - 2¹⁴ = 539047 is a prime.

It is a super-2 number, since 2×555431² = 617007191522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 555397 and 555406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6416 + ... + 6501.

It is an arithmetic number, because the mean of its divisors is an integer number (142098).

2⁵⁵⁵⁴³¹ is an apocalyptic number.

555431 is a deficient number, since it is larger than the sum of its proper divisors (12961).

555431 is a wasteful number, since it uses less digits than its factorization.

555431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12960.

The product of its digits is 1500, while the sum is 23.

The square root of 555431 is about 745.2724334094. The cubic root of 555431 is about 82.2009250769.

Adding to 555431 its reverse (134555), we get a palindrome (689986).

The spelling of 555431 in words is "five hundred fifty-five thousand, four hundred thirty-one".