106530221 has 8 divisors (see below), whose sum is σ = 124580544. Its totient is φ = 89187840.

The previous prime is 106530199. The next prime is 106530257. The reversal of 106530221 is 122035601.

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

It is not a de Polignac number, because 106530221 - 2¹⁴ = 106513837 is a prime.

It is a super-2 number, since 2×106530221² = 22697375972617682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 106530193 and 106530202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106530271) 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, 176660 + ... + 177261.

It is an arithmetic number, because the mean of its divisors is an integer number (15572568).

Almost surely, 2^106530221 is an apocalyptic number.

It is an amenable number.

106530221 is a deficient number, since it is larger than the sum of its proper divisors (18050323).

106530221 is an equidigital number, since it uses as much as digits as its factorization.

106530221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353971.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 106530221 is about 10321.3478286511. The cubic root of 106530221 is about 474.0501365306.

Adding to 106530221 its reverse (122035601), we get a palindrome (228565822).

The spelling of 106530221 in words is "one hundred six million, five hundred thirty thousand, two hundred twenty-one".