2155007 has 2 divisors, whose sum is σ = 2155008. Its totient is φ = 2155006.

The previous prime is 2155003. The next prime is 2155009. The reversal of 2155007 is 7005512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2155007 - 2² = 2155003 is a prime.

Together with 2155009, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2155007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155003) 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 as a sum of consecutive naturals, namely, 1077503 + 1077504.

It is an arithmetic number, because the mean of its divisors is an integer number (1077504).

2^2155007 is an apocalyptic number.

2155007 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155007 is an equidigital number, since it uses as much as digits as its factorization.

2155007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 2155007 is about 1467.9942097978. The cubic root of 2155007 is about 129.1664018494.

The spelling of 2155007 in words is "two million, one hundred fifty-five thousand, seven".