2155306 has 8 divisors (see below), whose sum is σ = 3337344. Its totient is φ = 1042860.

The previous prime is 2155297. The next prime is 2155319. The reversal of 2155306 is 6035512.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17320 + ... + 17443.

It is an arithmetic number, because the mean of its divisors is an integer number (417168).

2^2155306 is an apocalyptic number.

2155306 is a deficient number, since it is larger than the sum of its proper divisors (1182038).

2155306 is a wasteful number, since it uses less digits than its factorization.

2155306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34796.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 2155306 is about 1468.0960459044. The cubic root of 2155306 is about 129.1723753749.

The spelling of 2155306 in words is "two million, one hundred fifty-five thousand, three hundred six".