550515540 has 48 divisors (see below), whose sum is σ = 1563166080. Its totient is φ = 144735360.

The previous prime is 550515527. The next prime is 550515551. The reversal of 550515540 is 45515055.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 550515498 and 550515507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60355 + ... + 68874.

It is an arithmetic number, because the mean of its divisors is an integer number (32565960).

Almost surely, 2^550515540 is an apocalyptic number.

It is an amenable number.

550515540 is an abundant number, since it is smaller than the sum of its proper divisors (1012650540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

550515540 is a wasteful number, since it uses less digits than its factorization.

550515540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129312 (or 129310 counting only the distinct ones).

The product of its (nonzero) digits is 12500, while the sum is 30.

The square root of 550515540 is about 23463.0675743817. The cubic root of 550515540 is about 819.5771863464.

The spelling of 550515540 in words is "five hundred fifty million, five hundred fifteen thousand, five hundred forty".