550782309 has 16 divisors (see below), whose sum is σ = 915586560. Its totient is φ = 286120560.

The previous prime is 550782293. The next prime is 550782319. The reversal of 550782309 is 903287055.

It is not a de Polignac number, because 550782309 - 2⁴ = 550782293 is a prime.

It is a super-2 number, since 2×550782309² = 606722303814742962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550782319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1191939 + ... + 1192400.

It is an arithmetic number, because the mean of its divisors is an integer number (57224160).

Almost surely, 2^550782309 is an apocalyptic number.

It is an amenable number.

550782309 is a deficient number, since it is larger than the sum of its proper divisors (364804251).

550782309 is a wasteful number, since it uses less digits than its factorization.

550782309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384360.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 550782309 is about 23468.7517563248. The cubic root of 550782309 is about 819.7095486288.

The spelling of 550782309 in words is "five hundred fifty million, seven hundred eighty-two thousand, three hundred nine".