107655221 has 4 divisors (see below), whose sum is σ = 111367500. Its totient is φ = 103942944.

The previous prime is 107655209. The next prime is 107655227. The reversal of 107655221 is 122556701.

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 36168196 + 71487025 = 6014^2 + 8455^2 .

It is a cyclic number.

It is not a de Polignac number, because 107655221 - 2¹⁴ = 107638837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 3712249 = 107655221 / (1 + 0 + 7 + 6 + 5 + 5 + 2 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (107655227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1856096 + ... + 1856153.

It is an arithmetic number, because the mean of its divisors is an integer number (27841875).

Almost surely, 2^107655221 is an apocalyptic number.

It is an amenable number.

107655221 is a deficient number, since it is larger than the sum of its proper divisors (3712279).

107655221 is an equidigital number, since it uses as much as digits as its factorization.

107655221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3712278.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 107655221 is about 10375.7033978425. The cubic root of 107655221 is about 475.7130137525.

The spelling of 107655221 in words is "one hundred seven million, six hundred fifty-five thousand, two hundred twenty-one".