2720213 has 4 divisors (see below), whose sum is σ = 2741760. Its totient is φ = 2698668.

The previous prime is 2720197. The next prime is 2720239. The reversal of 2720213 is 3120272.

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 2720213 - 2⁴ = 2720197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2720191 and 2720200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2720243) 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, 10583 + ... + 10836.

It is an arithmetic number, because the mean of its divisors is an integer number (685440).

2^2720213 is an apocalyptic number.

It is an amenable number.

2720213 is a deficient number, since it is larger than the sum of its proper divisors (21547).

2720213 is a wasteful number, since it uses less digits than its factorization.

2720213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21546.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 2720213 is about 1649.3068240931. The cubic root of 2720213 is about 139.5942845694.

Adding to 2720213 its reverse (3120272), we get a palindrome (5840485).

The spelling of 2720213 in words is "two million, seven hundred twenty thousand, two hundred thirteen".