65251905 has 16 divisors (see below), whose sum is σ = 107225664. Its totient is φ = 33860160.

The previous prime is 65251873. The next prime is 65251913. The reversal of 65251905 is 50915256.

65251905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65251905 - 2⁵ = 65251873 is a prime.

It is a super-2 number, since 2×65251905² = 8515622212258050, which contains 22 as substring.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 58231 + ... + 59340.

It is an arithmetic number, because the mean of its divisors is an integer number (6701604).

Almost surely, 2^65251905 is an apocalyptic number.

It is an amenable number.

65251905 is a deficient number, since it is larger than the sum of its proper divisors (41973759).

65251905 is a wasteful number, since it uses less digits than its factorization.

65251905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117616.

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 65251905 is about 8077.8651263809. The cubic root of 65251905 is about 402.5913119222.

The spelling of 65251905 in words is "sixty-five million, two hundred fifty-one thousand, nine hundred five".