550731720 has 256 divisors, whose sum is σ = 2168985600. Its totient is φ = 108380160.

The previous prime is 550731719. The next prime is 550731749. The reversal of 550731720 is 27137055.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 173992 + ... + 177128.

It is an arithmetic number, because the mean of its divisors is an integer number (8472600).

Almost surely, 2^550731720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550731720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1084492800).

550731720 is an abundant number, since it is smaller than the sum of its proper divisors (1618253880).

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

550731720 is a wasteful number, since it uses less digits than its factorization.

550731720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3188 (or 3184 counting only the distinct ones).

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 550731720 is about 23467.6739367156. The cubic root of 550731720 is about 819.6844512625.

Adding to 550731720 its reverse (27137055), we get a palindrome (577868775).

The spelling of 550731720 in words is "five hundred fifty million, seven hundred thirty-one thousand, seven hundred twenty".