7281213 has 8 divisors (see below), whose sum is σ = 9735168. Its totient is φ = 4840704.

The previous prime is 7281203. The next prime is 7281223. The reversal of 7281213 is 3121827.

It is an interprime number because it is at equal distance from previous prime (7281203) and next prime (7281223).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7281213 - 2⁵ = 7281181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7281203) 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, 2020 + ... + 4317.

It is an arithmetic number, because the mean of its divisors is an integer number (1216896).

Almost surely, 2^7281213 is an apocalyptic number.

It is an amenable number.

7281213 is a deficient number, since it is larger than the sum of its proper divisors (2453955).

7281213 is a wasteful number, since it uses less digits than its factorization.

7281213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6723.

The product of its digits is 672, while the sum is 24.

The square root of 7281213 is about 2698.3722871390. The cubic root of 7281213 is about 193.8211853585.

The spelling of 7281213 in words is "seven million, two hundred eighty-one thousand, two hundred thirteen".