555231 has 4 divisors (see below), whose sum is σ = 740312. Its totient is φ = 370152.

The previous prime is 555221. The next prime is 555251. The reversal of 555231 is 132555.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 555231 - 2⁶ = 555167 is a prime.

It is a super-2 number, since 2×555231² = 616562926722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 555198 and 555207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555221) 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, 92536 + ... + 92541.

It is an arithmetic number, because the mean of its divisors is an integer number (185078).

2⁵⁵⁵²³¹ is an apocalyptic number.

555231 is a deficient number, since it is larger than the sum of its proper divisors (185081).

555231 is a wasteful number, since it uses less digits than its factorization.

555231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185080.

The product of its digits is 750, while the sum is 21.

The square root of 555231 is about 745.1382422074. The cubic root of 555231 is about 82.1910575694.

Adding to 555231 its reverse (132555), we get a palindrome (687786).

The spelling of 555231 in words is "five hundred fifty-five thousand, two hundred thirty-one".