550531 has 2 divisors, whose sum is σ = 550532. Its totient is φ = 550530.

The previous prime is 550519. The next prime is 550541. The reversal of 550531 is 135055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 550531 - 2¹⁷ = 419459 is a prime.

It is a super-2 number, since 2×550531² = 606168763922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 550499 and 550508.

It is not a weakly prime, because it can be changed into another prime (550541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275265 + 275266.

It is an arithmetic number, because the mean of its divisors is an integer number (275266).

2⁵⁵⁰⁵³¹ is an apocalyptic number.

550531 is a deficient number, since it is larger than the sum of its proper divisors (1).

550531 is an equidigital number, since it uses as much as digits as its factorization.

550531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 375, while the sum is 19.

The square root of 550531 is about 741.9777624700. The cubic root of 550531 is about 81.9584858273.

Adding to 550531 its reverse (135055), we get a palindrome (685586).

It can be divided in two parts, 550 and 531, that added together give a triangular number (1081 = T₄₆).

The spelling of 550531 in words is "five hundred fifty thousand, five hundred thirty-one".