2131518 has 16 divisors (see below), whose sum is σ = 4277376. Its totient is φ = 708120.

The previous prime is 2131517. The next prime is 2131531. The reversal of 2131518 is 8151312.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2131494 and 2131503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131513) 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, 3063 + ... + 3693.

It is an arithmetic number, because the mean of its divisors is an integer number (267336).

2^2131518 is an apocalyptic number.

2131518 is an abundant number, since it is smaller than the sum of its proper divisors (2145858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2131518 is a wasteful number, since it uses less digits than its factorization.

2131518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199.

The product of its digits is 240, while the sum is 21.

The square root of 2131518 is about 1459.9719175381. The cubic root of 2131518 is about 128.6953933133.

The spelling of 2131518 in words is "two million, one hundred thirty-one thousand, five hundred eighteen".