555221112 has 64 divisors (see below), whose sum is σ = 1429186080. Its totient is φ = 179615232.

The previous prime is 555221101. The next prime is 555221119. The reversal of 555221112 is 211122555.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555221119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 650478 + ... + 651330.

Almost surely, 2^555221112 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 555221112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (714593040).

555221112 is an abundant number, since it is smaller than the sum of its proper divisors (873964968).

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

555221112 is a wasteful number, since it uses less digits than its factorization.

555221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632 (or 1628 counting only the distinct ones).

The product of its digits is 1000, while the sum is 24.

The square root of 555221112 is about 23563.1303523110. The cubic root of 555221112 is about 821.9056965832.

Adding to 555221112 its reverse (211122555), we get a palindrome (766343667).

The spelling of 555221112 in words is "five hundred fifty-five million, two hundred twenty-one thousand, one hundred twelve".