75216149 has 2 divisors, whose sum is σ = 75216150. Its totient is φ = 75216148.

The previous prime is 75216133. The next prime is 75216157. The reversal of 75216149 is 94161257.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69189124 + 6027025 = 8318^2 + 2455^2 .

It is a cyclic number.

It is not a de Polignac number, because 75216149 - 2⁴ = 75216133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75216949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37608074 + 37608075.

It is an arithmetic number, because the mean of its divisors is an integer number (37608075).

Almost surely, 2^75216149 is an apocalyptic number.

It is an amenable number.

75216149 is a deficient number, since it is larger than the sum of its proper divisors (1).

75216149 is an equidigital number, since it uses as much as digits as its factorization.

75216149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 35.

The square root of 75216149 is about 8672.7244277678. The cubic root of 75216149 is about 422.1210710319.

The spelling of 75216149 in words is "seventy-five million, two hundred sixteen thousand, one hundred forty-nine".