65378251 has 2 divisors, whose sum is σ = 65378252. Its totient is φ = 65378250.

The previous prime is 65378219. The next prime is 65378263. The reversal of 65378251 is 15287356.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65378251 - 2⁵ = 65378219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65378251.

It is not a weakly prime, because it can be changed into another prime (65378281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32689125 + 32689126.

It is an arithmetic number, because the mean of its divisors is an integer number (32689126).

Almost surely, 2^65378251 is an apocalyptic number.

65378251 is a deficient number, since it is larger than the sum of its proper divisors (1).

65378251 is an equidigital number, since it uses as much as digits as its factorization.

65378251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 37.

The square root of 65378251 is about 8085.6818512727. The cubic root of 65378251 is about 402.8509876461.

The spelling of 65378251 in words is "sixty-five million, three hundred seventy-eight thousand, two hundred fifty-one".