550640311 has 8 divisors (see below), whose sum is σ = 624207920. Its totient is φ = 481531392.

The previous prime is 550640269. The next prime is 550640317. The reversal of 550640311 is 113046055.

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

It is a cyclic number.

It is not a de Polignac number, because 550640311 - 2²¹ = 548543159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550640317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1114410 + ... + 1114903.

It is an arithmetic number, because the mean of its divisors is an integer number (78025990).

Almost surely, 2^550640311 is an apocalyptic number.

550640311 is a deficient number, since it is larger than the sum of its proper divisors (73567609).

550640311 is a wasteful number, since it uses less digits than its factorization.

550640311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2229345.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 550640311 is about 23465.7263045489. The cubic root of 550640311 is about 819.6390990647.

Adding to 550640311 its reverse (113046055), we get a palindrome (663686366).

The spelling of 550640311 in words is "five hundred fifty million, six hundred forty thousand, three hundred eleven".