2115853 has 2 divisors, whose sum is σ = 2115854. Its totient is φ = 2115852.

The previous prime is 2115847. The next prime is 2115863. The reversal of 2115853 is 3585112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2036329 + 79524 = 1427^2 + 282^2 .

It is a cyclic number.

It is not a de Polignac number, because 2115853 - 2¹³ = 2107661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2115823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057926 + 1057927.

It is an arithmetic number, because the mean of its divisors is an integer number (1057927).

2^2115853 is an apocalyptic number.

It is an amenable number.

2115853 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115853 is an equidigital number, since it uses as much as digits as its factorization.

2115853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 25.

The square root of 2115853 is about 1454.5971951025. The cubic root of 2115853 is about 128.3793474545.

The spelling of 2115853 in words is "two million, one hundred fifteen thousand, eight hundred fifty-three".