1220030550 has 72 divisors (see below), whose sum is σ = 3298122984. Its totient is φ = 323326080.

The previous prime is 1220030543. The next prime is 1220030573. The reversal of 1220030550 is 550300221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 65034 + ... + 81666.

Almost surely, 2^1220030550 is an apocalyptic number.

1220030550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220030550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1649061492).

1220030550 is an abundant number, since it is smaller than the sum of its proper divisors (2078092434).

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

1220030550 is a wasteful number, since it uses less digits than its factorization.

1220030550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16814 (or 16806 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 1220030550 is about 34928.9357123861. The cubic root of 1220030550 is about 1068.5386490862.

Adding to 1220030550 its reverse (550300221), we get a palindrome (1770330771).

The spelling of 1220030550 in words is "one billion, two hundred twenty million, thirty thousand, five hundred fifty".