550515021240 has 128 divisors (see below), whose sum is σ = 1694164792320. Its totient is φ = 143025484800.

The previous prime is 550515021137. The next prime is 550515021311. The reversal of 550515021240 is 42120515055.

It is a super-2 number, since 2×550515021240² (a number of 24 digits) contains 22 as substring.

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 = 550515021198 and 550515021207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3499885 + ... + 3653795.

It is an arithmetic number, because the mean of its divisors is an integer number (13235662440).

Almost surely, 2^550515021240 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 550515021240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (847082396160).

550515021240 is an abundant number, since it is smaller than the sum of its proper divisors (1143649771080).

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

550515021240 is a wasteful number, since it uses less digits than its factorization.

550515021240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154693 (or 154689 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

Adding to 550515021240 its reverse (42120515055), we get a palindrome (592635536295).

The spelling of 550515021240 in words is "five hundred fifty billion, five hundred fifteen million, twenty-one thousand, two hundred forty".