2118207 has 16 divisors (see below), whose sum is σ = 3476480. Its totient is φ = 1117152.

The previous prime is 2118187. The next prime is 2118209. The reversal of 2118207 is 7028112.

It is not a de Polignac number, because 2118207 - 2⁷ = 2118079 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3607 + ... + 4152.

It is an arithmetic number, because the mean of its divisors is an integer number (217280).

2^2118207 is an apocalyptic number.

2118207 is a deficient number, since it is larger than the sum of its proper divisors (1358273).

2118207 is a wasteful number, since it uses less digits than its factorization.

2118207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7782.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 2118207 is about 1455.4061288864. The cubic root of 2118207 is about 128.4269394470.

The spelling of 2118207 in words is "two million, one hundred eighteen thousand, two hundred seven".