105523020 has 48 divisors (see below), whose sum is σ = 328295520. Its totient is φ = 28139328.

The previous prime is 105523013. The next prime is 105523021. The reversal of 105523020 is 20325501.

It is a happy number.

It is a super-2 number, since 2×105523020² = 22270215499840800, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 105522984 and 105523002.

It is not an unprimeable number, because it can be changed into a prime (105523021) 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, 97167 + ... + 98246.

It is an arithmetic number, because the mean of its divisors is an integer number (6839490).

Almost surely, 2^105523020 is an apocalyptic number.

105523020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

105523020 is an abundant number, since it is smaller than the sum of its proper divisors (222772500).

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

105523020 is a wasteful number, since it uses less digits than its factorization.

105523020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195431 (or 195423 counting only the distinct ones).

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

The square root of 105523020 is about 10272.4398270323. The cubic root of 105523020 is about 472.5514179368.

Adding to 105523020 its reverse (20325501), we get a palindrome (125848521).

The spelling of 105523020 in words is "one hundred five million, five hundred twenty-three thousand, twenty".