11005554 has 32 divisors (see below), whose sum is σ = 25537536. Its totient is φ = 3096720.

The previous prime is 11005537. The next prime is 11005571. The reversal of 11005554 is 45550011.

It is an interprime number because it is at equal distance from previous prime (11005537) and next prime (11005571).

It is a super-2 number, since 2×11005554² = 242244437693832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11005554.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 859 + ... + 4769.

It is an arithmetic number, because the mean of its divisors is an integer number (798048).

Almost surely, 2^11005554 is an apocalyptic number.

11005554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11005554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12768768).

11005554 is an abundant number, since it is smaller than the sum of its proper divisors (14531982).

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

11005554 is a wasteful number, since it uses less digits than its factorization.

11005554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3990.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 11005554 is about 3317.4619816962. The cubic root of 11005554 is about 222.4354330179.

Adding to 11005554 its reverse (45550011), we get a palindrome (56555565).

The spelling of 11005554 in words is "eleven million, five thousand, five hundred fifty-four".