2131217 has 8 divisors (see below), whose sum is σ = 2336160. Its totient is φ = 1928160.

The previous prime is 2131193. The next prime is 2131223. The reversal of 2131217 is 7121312.

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

It is a cyclic number.

It is not a de Polignac number, because 2131217 - 2¹⁸ = 1869073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131195 and 2131204.

It is not an unprimeable number, because it can be changed into a prime (2131247) 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, 3134 + ... + 3752.

It is an arithmetic number, because the mean of its divisors is an integer number (292020).

2^2131217 is an apocalyptic number.

It is an amenable number.

2131217 is a deficient number, since it is larger than the sum of its proper divisors (204943).

2131217 is a wasteful number, since it uses less digits than its factorization.

2131217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943.

The product of its digits is 84, while the sum is 17.

The square root of 2131217 is about 1459.8688297241. The cubic root of 2131217 is about 128.6893351680.

Adding to 2131217 its reverse (7121312), we get a palindrome (9252529).

The spelling of 2131217 in words is "two million, one hundred thirty-one thousand, two hundred seventeen".