10555218 has 32 divisors (see below), whose sum is σ = 23860800. Its totient is φ = 3457728.

The previous prime is 10555211. The next prime is 10555219. The reversal of 10555218 is 81255501.

10555218 is a `hidden beast` number, since 105 + 552 + 1 + 8 = 666.

It is a super-2 number, since 2×10555218² = 222825254055048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10555191 and 10555200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10555211) 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, 1530 + ... + 4842.

It is an arithmetic number, because the mean of its divisors is an integer number (745650).

Almost surely, 2^10555218 is an apocalyptic number.

10555218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10555218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11930400).

10555218 is an abundant number, since it is smaller than the sum of its proper divisors (13305582).

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

10555218 is a wasteful number, since it uses less digits than its factorization.

10555218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3383 (or 3377 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 10555218 is about 3248.8794991504. The cubic root of 10555218 is about 219.3591405001.

It can be divided in two parts, 105552 and 18, that added together give a triangular number (105570 = T₄₅₉).

The spelling of 10555218 in words is "ten million, five hundred fifty-five thousand, two hundred eighteen".