65155251 has 32 divisors (see below), whose sum is σ = 105753600. Its totient is φ = 35599872.

The previous prime is 65155247. The next prime is 65155253. The reversal of 65155251 is 15255156.

65155251 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 65155251 - 2² = 65155247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65155253) 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 in 31 ways as a sum of consecutive naturals, for example, 22291 + ... + 25043.

It is an arithmetic number, because the mean of its divisors is an integer number (3304800).

Almost surely, 2^65155251 is an apocalyptic number.

65155251 is a deficient number, since it is larger than the sum of its proper divisors (40598349).

65155251 is a wasteful number, since it uses less digits than its factorization.

65155251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800 (or 2786 counting only the distinct ones).

The product of its digits is 7500, while the sum is 30.

The square root of 65155251 is about 8071.8802642259. The cubic root of 65155251 is about 402.3924350248.

The spelling of 65155251 in words is "sixty-five million, one hundred fifty-five thousand, two hundred fifty-one".