106550221 has 2 divisors, whose sum is σ = 106550222. Its totient is φ = 106550220.

The previous prime is 106550189. The next prime is 106550251. The reversal of 106550221 is 122055601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79655625 + 26894596 = 8925^2 + 5186^2 .

It is a cyclic number.

It is not a de Polignac number, because 106550221 - 2⁵ = 106550189 is a prime.

It is a super-2 number, since 2×106550221² = 22705899190297682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 106550192 and 106550201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106550251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53275110 + 53275111.

It is an arithmetic number, because the mean of its divisors is an integer number (53275111).

Almost surely, 2^106550221 is an apocalyptic number.

It is an amenable number.

106550221 is a deficient number, since it is larger than the sum of its proper divisors (1).

106550221 is an equidigital number, since it uses as much as digits as its factorization.

106550221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 106550221 is about 10322.3166488923. The cubic root of 106550221 is about 474.0798007560.

The spelling of 106550221 in words is "one hundred six million, five hundred fifty thousand, two hundred twenty-one".