7240213 has 4 divisors (see below), whose sum is σ = 7339468. Its totient is φ = 7140960.

The previous prime is 7240201. The next prime is 7240241. The reversal of 7240213 is 3120427.

It is the 1099-th star number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3120427 = 19 ⋅164233.

It can be written as a sum of positive squares in 2 ways, for example, as 3526884 + 3713329 = 1878^2 + 1927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7240213 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7240243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49518 + ... + 49663.

It is an arithmetic number, because the mean of its divisors is an integer number (1834867).

Almost surely, 2^7240213 is an apocalyptic number.

7240213 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

7240213 is a deficient number, since it is larger than the sum of its proper divisors (99255).

7240213 is an equidigital number, since it uses as much as digits as its factorization.

7240213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99254.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 7240213 is about 2690.7643895369. The cubic root of 7240213 is about 193.4567025382.

The spelling of 7240213 in words is "seven million, two hundred forty thousand, two hundred thirteen".