65225691 has 12 divisors (see below), whose sum is σ = 94781232. Its totient is φ = 43222416.

The previous prime is 65225681. The next prime is 65225731. The reversal of 65225691 is 19652256.

It is not a de Polignac number, because 65225691 - 2⁵ = 65225659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65225681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20196 + ... + 23201.

It is an arithmetic number, because the mean of its divisors is an integer number (7898436).

Almost surely, 2^65225691 is an apocalyptic number.

65225691 is a deficient number, since it is larger than the sum of its proper divisors (29555541).

65225691 is a wasteful number, since it uses less digits than its factorization.

65225691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43570 (or 43567 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 65225691 is about 8076.2423812067. The cubic root of 65225691 is about 402.5373929742.

The spelling of 65225691 in words is "sixty-five million, two hundred twenty-five thousand, six hundred ninety-one".