2133815 has 4 divisors (see below), whose sum is σ = 2560584. Its totient is φ = 1707048.

The previous prime is 2133811. The next prime is 2133821. The reversal of 2133815 is 5183312.

2133815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2133815 - 2² = 2133811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213377 + ... + 213386.

It is an arithmetic number, because the mean of its divisors is an integer number (640146).

2^2133815 is an apocalyptic number.

2133815 is a deficient number, since it is larger than the sum of its proper divisors (426769).

2133815 is an equidigital number, since it uses as much as digits as its factorization.

2133815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426768.

The product of its digits is 720, while the sum is 23.

The square root of 2133815 is about 1460.7583646860. The cubic root of 2133815 is about 128.7416056361.

The spelling of 2133815 in words is "two million, one hundred thirty-three thousand, eight hundred fifteen".