550591961 has 4 divisors (see below), whose sum is σ = 568353024. Its totient is φ = 532830900.

The previous prime is 550591957. The next prime is 550592011. The reversal of 550591961 is 169195055.

550591961 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 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 550591961 - 2² = 550591957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550591901) 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, 8880485 + ... + 8880546.

It is an arithmetic number, because the mean of its divisors is an integer number (142088256).

Almost surely, 2^550591961 is an apocalyptic number.

It is an amenable number.

550591961 is a deficient number, since it is larger than the sum of its proper divisors (17761063).

550591961 is a wasteful number, since it uses less digits than its factorization.

550591961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17761062.

The product of its (nonzero) digits is 60750, while the sum is 41.

The square root of 550591961 is about 23464.6960559902. The cubic root of 550591961 is about 819.6151083823.

The spelling of 550591961 in words is "five hundred fifty million, five hundred ninety-one thousand, nine hundred sixty-one".