106448821 has 4 divisors (see below), whose sum is σ = 110119500. Its totient is φ = 102778144.

The previous prime is 106448813. The next prime is 106448851. The reversal of 106448821 is 128844601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53085796 + 53363025 = 7286^2 + 7305^2 .

It is a cyclic number.

It is not a de Polignac number, because 106448821 - 2³ = 106448813 is a prime.

It is a super-2 number, since 2×106448821² = 22662702984580082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106448851) 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, 1835296 + ... + 1835353.

It is an arithmetic number, because the mean of its divisors is an integer number (27529875).

Almost surely, 2^106448821 is an apocalyptic number.

It is an amenable number.

106448821 is a deficient number, since it is larger than the sum of its proper divisors (3670679).

106448821 is an equidigital number, since it uses as much as digits as its factorization.

106448821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670678.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 106448821 is about 10317.4037916522. The cubic root of 106448821 is about 473.9293648120.

The spelling of 106448821 in words is "one hundred six million, four hundred forty-eight thousand, eight hundred twenty-one".