65213251 has 2 divisors, whose sum is σ = 65213252. Its totient is φ = 65213250.

The previous prime is 65213227. The next prime is 65213273. The reversal of 65213251 is 15231256.

65213251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65213251 - 2⁷ = 65213123 is a prime.

It is not a weakly prime, because it can be changed into another prime (65213201) 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 as a sum of consecutive naturals, namely, 32606625 + 32606626.

It is an arithmetic number, because the mean of its divisors is an integer number (32606626).

Almost surely, 2^65213251 is an apocalyptic number.

65213251 is a deficient number, since it is larger than the sum of its proper divisors (1).

65213251 is an equidigital number, since it uses as much as digits as its factorization.

65213251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 65213251 is about 8075.4721843370. The cubic root of 65213251 is about 402.5118003819.

The spelling of 65213251 in words is "sixty-five million, two hundred thirteen thousand, two hundred fifty-one".