550591138 has 8 divisors (see below), whose sum is σ = 874468332. Its totient is φ = 259101696.

The previous prime is 550591133. The next prime is 550591141. The reversal of 550591138 is 831195055.

It can be written as a sum of positive squares in 2 ways, for example, as 476854569 + 73736569 = 21837^2 + 8587^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 550591097 and 550591106.

It is not an unprimeable number, because it can be changed into a prime (550591133) 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, 8096895 + ... + 8096962.

Almost surely, 2^550591138 is an apocalyptic number.

550591138 is a deficient number, since it is larger than the sum of its proper divisors (323877194).

550591138 is a wasteful number, since it uses less digits than its factorization.

550591138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16193876.

The product of its (nonzero) digits is 27000, while the sum is 37.

The square root of 550591138 is about 23464.6785189996. The cubic root of 550591138 is about 819.6147000076.

The spelling of 550591138 in words is "five hundred fifty million, five hundred ninety-one thousand, one hundred thirty-eight".