7882213 has 4 divisors (see below), whose sum is σ = 8030988. Its totient is φ = 7733440.

The previous prime is 7882211. The next prime is 7882219. The reversal of 7882213 is 3122887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3122887 = 157 ⋅19891.

It can be written as a sum of positive squares in 2 ways, for example, as 2765569 + 5116644 = 1663^2 + 2262^2 .

It is a cyclic number.

It is not a de Polignac number, because 7882213 - 2¹ = 7882211 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 7⁸ + 8² + 8³ + 2²⁰ + 2²⁰ + 1 + 3⁹ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7882211) 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, 74308 + ... + 74413.

It is an arithmetic number, because the mean of its divisors is an integer number (2007747).

Almost surely, 2^7882213 is an apocalyptic number.

It is an amenable number.

7882213 is a deficient number, since it is larger than the sum of its proper divisors (148775).

7882213 is a wasteful number, since it uses less digits than its factorization.

7882213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148774.

The product of its digits is 5376, while the sum is 31.

The square root of 7882213 is about 2807.5279161568. The cubic root of 7882213 is about 199.0135845882.

The spelling of 7882213 in words is "seven million, eight hundred eighty-two thousand, two hundred thirteen".