106446221 has 4 divisors (see below), whose sum is σ = 121652832. Its totient is φ = 91239612.

The previous prime is 106446217. The next prime is 106446257. The reversal of 106446221 is 122644601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122644601 = 19 ⋅6454979.

It is a cyclic number.

It is not a de Polignac number, because 106446221 - 2² = 106446217 is a prime.

It is a super-2 number, since 2×106446221² = 22661595930361682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106446271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7603295 + ... + 7603308.

It is an arithmetic number, because the mean of its divisors is an integer number (30413208).

Almost surely, 2^106446221 is an apocalyptic number.

It is an amenable number.

106446221 is a deficient number, since it is larger than the sum of its proper divisors (15206611).

106446221 is an equidigital number, since it uses as much as digits as its factorization.

106446221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15206610.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 106446221 is about 10317.2777901925. The cubic root of 106446221 is about 473.9255062242.

The spelling of 106446221 in words is "one hundred six million, four hundred forty-six thousand, two hundred twenty-one".