550463991 has 144 divisors (see below), whose sum is σ = 1050755328. Its totient is φ = 252806400.

The previous prime is 550463987. The next prime is 550463999. The reversal of 550463991 is 199364055.

It is not a de Polignac number, because 550463991 - 2² = 550463987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550463999) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 13425931 + ... + 13425971.

It is an arithmetic number, because the mean of its divisors is an integer number (7296912).

Almost surely, 2^550463991 is an apocalyptic number.

550463991 is a deficient number, since it is larger than the sum of its proper divisors (500291337).

550463991 is a wasteful number, since it uses less digits than its factorization.

550463991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 42.

The square root of 550463991 is about 23461.9690350149. The cubic root of 550463991 is about 819.5516044448.

The spelling of 550463991 in words is "five hundred fifty million, four hundred sixty-three thousand, nine hundred ninety-one".