7213278 has 16 divisors (see below), whose sum is σ = 14734080. Its totient is φ = 2353176.

The previous prime is 7213277. The next prime is 7213279. The reversal of 7213278 is 8723127.

7213278 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (7213277) and next prime (7213279).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7213273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12508 + ... + 13071.

It is an arithmetic number, because the mean of its divisors is an integer number (920880).

Almost surely, 2^7213278 is an apocalyptic number.

7213278 is an abundant number, since it is smaller than the sum of its proper divisors (7520802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7213278 is a wasteful number, since it uses less digits than its factorization.

7213278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25631.

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

The square root of 7213278 is about 2685.7546425539. The cubic root of 7213278 is about 193.2165055833.

The spelling of 7213278 in words is "seven million, two hundred thirteen thousand, two hundred seventy-eight".