67215133 has 2 divisors, whose sum is σ = 67215134. Its totient is φ = 67215132.

The previous prime is 67215097. The next prime is 67215151. The reversal of 67215133 is 33151276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58706244 + 8508889 = 7662^2 + 2917^2 .

It is a cyclic number.

It is not a de Polignac number, because 67215133 - 2¹³ = 67206941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67215193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33607566 + 33607567.

It is an arithmetic number, because the mean of its divisors is an integer number (33607567).

Almost surely, 2^67215133 is an apocalyptic number.

It is an amenable number.

67215133 is a deficient number, since it is larger than the sum of its proper divisors (1).

67215133 is an equidigital number, since it uses as much as digits as its factorization.

67215133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 28.

The square root of 67215133 is about 8198.4835792968. The cubic root of 67215133 is about 406.5890585427.

The spelling of 67215133 in words is "sixty-seven million, two hundred fifteen thousand, one hundred thirty-three".