550640881 has 24 divisors (see below), whose sum is σ = 677875200. Its totient is φ = 447036408.

The previous prime is 550640851. The next prime is 550640911. The reversal of 550640881 is 188046055.

It is an interprime number because it is at equal distance from previous prime (550640851) and next prime (550640911).

It is not a de Polignac number, because 550640881 - 2¹³ = 550632689 is a prime.

It is a super-2 number, since 2×550640881² = 606410759656912322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 550640881.

It is not an unprimeable number, because it can be changed into a prime (550640801) 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 23 ways as a sum of consecutive naturals, for example, 121600 + ... + 126046.

It is an arithmetic number, because the mean of its divisors is an integer number (28244800).

Almost surely, 2^550640881 is an apocalyptic number.

It is an amenable number.

550640881 is a deficient number, since it is larger than the sum of its proper divisors (127234319).

550640881 is an equidigital number, since it uses as much as digits as its factorization.

550640881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4506 (or 4473 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 550640881 is about 23465.7384499189. The cubic root of 550640881 is about 819.6393818834.

The spelling of 550640881 in words is "five hundred fifty million, six hundred forty thousand, eight hundred eighty-one".