550505557 has 4 divisors (see below), whose sum is σ = 629149216. Its totient is φ = 471861900.

The previous prime is 550505539. The next prime is 550505591. The reversal of 550505557 is 755505055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 550505557 - 2⁷ = 550505429 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 (550505507) 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, 39321819 + ... + 39321832.

It is an arithmetic number, because the mean of its divisors is an integer number (157287304).

Almost surely, 2^550505557 is an apocalyptic number.

It is an amenable number.

550505557 is a deficient number, since it is larger than the sum of its proper divisors (78643659).

550505557 is an equidigital number, since it uses as much as digits as its factorization.

550505557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78643658.

The product of its (nonzero) digits is 109375, while the sum is 37.

The square root of 550505557 is about 23462.8548348235. The cubic root of 550505557 is about 819.5722322698.

The spelling of 550505557 in words is "five hundred fifty million, five hundred five thousand, five hundred fifty-seven".