550618 has 4 divisors (see below), whose sum is σ = 825930. Its totient is φ = 275308.

The previous prime is 550609. The next prime is 550621. The reversal of 550618 is 816055.

550618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 816055 = 5 ⋅163211.

It can be written as a sum of positive squares in only one way, i.e., 522729 + 27889 = 723^2 + 167^2 .

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 550592 and 550601.

It is an unprimeable number.

550618 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137653 + ... + 137656.

2⁵⁵⁰⁶¹⁸ is an apocalyptic number.

550618 is a deficient number, since it is larger than the sum of its proper divisors (275312).

550618 is a wasteful number, since it uses less digits than its factorization.

550618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275311.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 550618 is about 742.0363872480. The cubic root of 550618 is about 81.9628028792.

It can be divided in two parts, 550 and 618, that multiplied together give a triangular number (339900 = T₈₂₄).

The spelling of 550618 in words is "five hundred fifty thousand, six hundred eighteen".