2155006 has 8 divisors (see below), whose sum is σ = 3694320. Its totient is φ = 923568.

The previous prime is 2155003. The next prime is 2155007. The reversal of 2155006 is 6005512.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155003) 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, 76951 + ... + 76978.

It is an arithmetic number, because the mean of its divisors is an integer number (461790).

2^2155006 is an apocalyptic number.

2155006 is a deficient number, since it is larger than the sum of its proper divisors (1539314).

2155006 is a wasteful number, since it uses less digits than its factorization.

2155006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153938.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 2155006 is about 1467.9938691970. The cubic root of 2155006 is about 129.1663818701.

The spelling of 2155006 in words is "two million, one hundred fifty-five thousand, six".