7213287 has 16 divisors (see below), whose sum is σ = 10340352. Its totient is φ = 4456320.

The previous prime is 7213279. The next prime is 7213291. The reversal of 7213287 is 7823127.

7213287 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7213287 - 2³ = 7213279 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7213277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2362 + ... + 4472.

It is an arithmetic number, because the mean of its divisors is an integer number (646272).

Almost surely, 2^7213287 is an apocalyptic number.

7213287 is a deficient number, since it is larger than the sum of its proper divisors (3127065).

7213287 is a wasteful number, since it uses less digits than its factorization.

7213287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198.

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

The square root of 7213287 is about 2685.7563180601. The cubic root of 7213287 is about 193.2165859420.

The spelling of 7213287 in words is "seven million, two hundred thirteen thousand, two hundred eighty-seven".