105523221 has 8 divisors (see below), whose sum is σ = 140993280. Its totient is φ = 70200992.

The previous prime is 105523219. The next prime is 105523237. The reversal of 105523221 is 122325501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 105523221 - 2¹ = 105523219 is a prime.

It is a super-2 number, since 2×105523221² = 22270300340429682, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105523261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35280 + ... + 38153.

It is an arithmetic number, because the mean of its divisors is an integer number (17624160).

Almost surely, 2^105523221 is an apocalyptic number.

It is an amenable number.

105523221 is a deficient number, since it is larger than the sum of its proper divisors (35470059).

105523221 is an equidigital number, since it uses as much as digits as its factorization.

105523221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73915.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 105523221 is about 10272.4496104873. The cubic root of 105523221 is about 472.5517179749.

Adding to 105523221 its reverse (122325501), we get a palindrome (227848722).

The spelling of 105523221 in words is "one hundred five million, five hundred twenty-three thousand, two hundred twenty-one".