2155799 has 2 divisors, whose sum is σ = 2155800. Its totient is φ = 2155798.

The previous prime is 2155793. The next prime is 2155837. The reversal of 2155799 is 9975512.

It is an a-pointer prime, because the next prime (2155837) can be obtained adding 2155799 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2155799 - 2¹² = 2151703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077899 + 1077900.

It is an arithmetic number, because the mean of its divisors is an integer number (1077900).

2^2155799 is an apocalyptic number.

2155799 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155799 is an equidigital number, since it uses as much as digits as its factorization.

2155799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28350, while the sum is 38.

The square root of 2155799 is about 1468.2639408499. The cubic root of 2155799 is about 129.1822234934.

The spelling of 2155799 in words is "two million, one hundred fifty-five thousand, seven hundred ninety-nine".