2155107 has 8 divisors (see below), whose sum is σ = 3042576. Its totient is φ = 1352192.

The previous prime is 2155103. The next prime is 2155121. The reversal of 2155107 is 7015512.

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

It is a cyclic number.

It is not a de Polignac number, because 2155107 - 2² = 2155103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2155103) 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, 21078 + ... + 21179.

It is an arithmetic number, because the mean of its divisors is an integer number (380322).

2^2155107 is an apocalyptic number.

2155107 is a deficient number, since it is larger than the sum of its proper divisors (887469).

2155107 is a wasteful number, since it uses less digits than its factorization.

2155107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42277.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 2155107 is about 1468.0282694826. The cubic root of 2155107 is about 129.1683997455.

The spelling of 2155107 in words is "two million, one hundred fifty-five thousand, one hundred seven".