75216511 has 2 divisors, whose sum is σ = 75216512. Its totient is φ = 75216510.

The previous prime is 75216469. The next prime is 75216521. The reversal of 75216511 is 11561257.

It is a strong prime.

It is an emirp because it is prime and its reverse (11561257) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75216511 - 2¹⁹ = 74692223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75216511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75216521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37608255 + 37608256.

It is an arithmetic number, because the mean of its divisors is an integer number (37608256).

Almost surely, 2^75216511 is an apocalyptic number.

75216511 is a deficient number, since it is larger than the sum of its proper divisors (1).

75216511 is an equidigital number, since it uses as much as digits as its factorization.

75216511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2100, while the sum is 28.

The square root of 75216511 is about 8672.7452977705. The cubic root of 75216511 is about 422.1217482251.

Adding to 75216511 its reverse (11561257), we get a palindrome (86777768).

The spelling of 75216511 in words is "seventy-five million, two hundred sixteen thousand, five hundred eleven".