2131718 has 8 divisors (see below), whose sum is σ = 3284112. Its totient is φ = 1037016.

The previous prime is 2131699. The next prime is 2131721. The reversal of 2131718 is 8171312.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 2131693 and 2131702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14330 + ... + 14477.

It is an arithmetic number, because the mean of its divisors is an integer number (410514).

2^2131718 is an apocalyptic number.

2131718 is a deficient number, since it is larger than the sum of its proper divisors (1152394).

2131718 is a wasteful number, since it uses less digits than its factorization.

2131718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28846.

The product of its digits is 336, while the sum is 23.

The square root of 2131718 is about 1460.0404103997. The cubic root of 2131718 is about 128.6994183436.

The spelling of 2131718 in words is "two million, one hundred thirty-one thousand, seven hundred eighteen".