7215133 has 2 divisors, whose sum is σ = 7215134. Its totient is φ = 7215132.

The previous prime is 7215127. The next prime is 7215167. The reversal of 7215133 is 3315127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6335289 + 879844 = 2517^2 + 938^2 .

It is an emirp because it is prime and its reverse (3315127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7215133 - 2¹⁷ = 7084061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7215433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3607566 + 3607567.

It is an arithmetic number, because the mean of its divisors is an integer number (3607567).

Almost surely, 2^7215133 is an apocalyptic number.

It is an amenable number.

7215133 is a deficient number, since it is larger than the sum of its proper divisors (1).

7215133 is an equidigital number, since it uses as much as digits as its factorization.

7215133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 22.

The square root of 7215133 is about 2686.0999609099. The cubic root of 7215133 is about 193.2330669811.

The spelling of 7215133 in words is "seven million, two hundred fifteen thousand, one hundred thirty-three".