2171213 has 4 divisors (see below), whose sum is σ = 2368608. Its totient is φ = 1973820.

The previous prime is 2171203. The next prime is 2171219. The reversal of 2171213 is 3121712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2171213 - 2¹⁴ = 2154829 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2171191 and 2171200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98681 + ... + 98702.

It is an arithmetic number, because the mean of its divisors is an integer number (592152).

2^2171213 is an apocalyptic number.

It is an amenable number.

2171213 is a deficient number, since it is larger than the sum of its proper divisors (197395).

2171213 is a wasteful number, since it uses less digits than its factorization.

2171213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197394.

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

The square root of 2171213 is about 1473.5036477729. The cubic root of 2171213 is about 129.4893776413.

Adding to 2171213 its reverse (3121712), we get a palindrome (5292925).

The spelling of 2171213 in words is "two million, one hundred seventy-one thousand, two hundred thirteen".