550953991 has 12 divisors (see below), whose sum is σ = 642304728. Its totient is φ = 471215472.

The previous prime is 550953973. The next prime is 550954007. The reversal of 550953991 is 199359055.

It is not a de Polignac number, because 550953991 - 2⁵ = 550953959 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 (550953961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10845 + ... + 34921.

It is an arithmetic number, because the mean of its divisors is an integer number (53525394).

Almost surely, 2^550953991 is an apocalyptic number.

550953991 is a deficient number, since it is larger than the sum of its proper divisors (91350737).

550953991 is a wasteful number, since it uses less digits than its factorization.

550953991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24558 (or 24551 counting only the distinct ones).

The product of its (nonzero) digits is 273375, while the sum is 46.

The square root of 550953991 is about 23472.4091435029. The cubic root of 550953991 is about 819.7947091680.

The spelling of 550953991 in words is "five hundred fifty million, nine hundred fifty-three thousand, nine hundred ninety-one".