2116815 has 8 divisors (see below), whose sum is σ = 3386928. Its totient is φ = 1128960.

The previous prime is 2116813. The next prime is 2116817. The reversal of 2116815 is 5186112.

It is an interprime number because it is at equal distance from previous prime (2116813) and next prime (2116817).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2116815 - 2¹ = 2116813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70546 + ... + 70575.

It is an arithmetic number, because the mean of its divisors is an integer number (423366).

2^2116815 is an apocalyptic number.

2116815 is a deficient number, since it is larger than the sum of its proper divisors (1270113).

2116815 is a wasteful number, since it uses less digits than its factorization.

2116815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141129.

The product of its digits is 480, while the sum is 24.

The square root of 2116815 is about 1454.9278332618. The cubic root of 2116815 is about 128.3988009515.

It can be divided in two parts, 21 and 16815, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 2116815 in words is "two million, one hundred sixteen thousand, eight hundred fifteen".