1220550024540 has 192 divisors, whose sum is σ = 4261357191168. Its totient is φ = 253589356800.

The previous prime is 1220550024511. The next prime is 1220550024571. The reversal of 1220550024540 is 454200550221.

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 = 1220550024498 and 1220550024507.

It is a congruent number.

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, 66662067 + ... + 66680373.

It is an arithmetic number, because the mean of its divisors is an integer number (22194568704).

Almost surely, 2^{1220550024540} is an apocalyptic number.

1220550024540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220550024540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2130678595584).

1220550024540 is an abundant number, since it is smaller than the sum of its proper divisors (3040807166628).

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

1220550024540 is a wasteful number, since it uses less digits than its factorization.

1220550024540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32768 (or 32766 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

Adding to 1220550024540 its reverse (454200550221), we get a palindrome (1674750574761).

The spelling of 1220550024540 in words is "one trillion, two hundred twenty billion, five hundred fifty million, twenty-four thousand, five hundred forty".