65625251 has 2 divisors, whose sum is σ = 65625252. Its totient is φ = 65625250.

The previous prime is 65625239. The next prime is 65625257. The reversal of 65625251 is 15252656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65625251 - 2¹⁴ = 65608867 is a prime.

It is equal to p_3875270 and since 65625251 and 3875270 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (65625257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32812625 + 32812626.

It is an arithmetic number, because the mean of its divisors is an integer number (32812626).

Almost surely, 2^65625251 is an apocalyptic number.

65625251 is a deficient number, since it is larger than the sum of its proper divisors (1).

65625251 is an equidigital number, since it uses as much as digits as its factorization.

65625251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 32.

The square root of 65625251 is about 8100.9413650513. The cubic root of 65625251 is about 403.3576757538.

The spelling of 65625251 in words is "sixty-five million, six hundred twenty-five thousand, two hundred fifty-one".