105523220 has 48 divisors (see below), whose sum is σ = 242923968. Its totient is φ = 38184960.

The previous prime is 105523219. The next prime is 105523237. The reversal of 105523220 is 22325501.

It is a super-2 number, since 2×105523220² = 22270299918336800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 105523192 and 105523201.

It is a congruent number.

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, 48884 + ... + 50996.

It is an arithmetic number, because the mean of its divisors is an integer number (5060916).

Almost surely, 2^105523220 is an apocalyptic number.

105523220 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 105523220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121461984).

105523220 is an abundant number, since it is smaller than the sum of its proper divisors (137400748).

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

105523220 is a wasteful number, since it uses less digits than its factorization.

105523220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2360 (or 2358 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 105523220 is about 10272.4495618134. The cubic root of 105523220 is about 472.5517164822.

Adding to 105523220 its reverse (22325501), we get a palindrome (127848721).

It can be divided in two parts, 105 and 523220, that added together give a palindrome (523325).

The spelling of 105523220 in words is "one hundred five million, five hundred twenty-three thousand, two hundred twenty".