7287213 has 4 divisors (see below), whose sum is σ = 9716288. Its totient is φ = 4858140.

The previous prime is 7287211. The next prime is 7287229. The reversal of 7287213 is 3127827.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3127827 = 3 ⋅1042609.

It is not a de Polignac number, because 7287213 - 2¹ = 7287211 is a prime.

It is a Duffinian number.

7287213 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7287211) 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, 1214533 + ... + 1214538.

It is an arithmetic number, because the mean of its divisors is an integer number (2429072).

Almost surely, 2^7287213 is an apocalyptic number.

It is an amenable number.

7287213 is a deficient number, since it is larger than the sum of its proper divisors (2429075).

7287213 is a wasteful number, since it uses less digits than its factorization.

7287213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429074.

The product of its digits is 4704, while the sum is 30.

The square root of 7287213 is about 2699.4838395516. The cubic root of 7287213 is about 193.8744094493.

The spelling of 7287213 in words is "seven million, two hundred eighty-seven thousand, two hundred thirteen".