2115523 has 2 divisors, whose sum is σ = 2115524. Its totient is φ = 2115522.

The previous prime is 2115511. The next prime is 2115527. The reversal of 2115523 is 3255112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2115523 - 2²¹ = 18371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2115523.

It is not a weakly prime, because it can be changed into another prime (2115527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057761 + 1057762.

It is an arithmetic number, because the mean of its divisors is an integer number (1057762).

2^2115523 is an apocalyptic number.

2115523 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115523 is an equidigital number, since it uses as much as digits as its factorization.

2115523 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2115523 is about 1454.4837572142. The cubic root of 2115523 is about 128.3726728593.

The spelling of 2115523 in words is "two million, one hundred fifteen thousand, five hundred twenty-three".