65125815 has 16 divisors (see below), whose sum is σ = 105670656. Its totient is φ = 34244000.

The previous prime is 65125813. The next prime is 65125829. The reversal of 65125815 is 51852156.

It is not a de Polignac number, because 65125815 - 2¹ = 65125813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65125813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29511 + ... + 31640.

It is an arithmetic number, because the mean of its divisors is an integer number (6604416).

Almost surely, 2^65125815 is an apocalyptic number.

65125815 is a deficient number, since it is larger than the sum of its proper divisors (40544841).

65125815 is a wasteful number, since it uses less digits than its factorization.

65125815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61230.

The product of its digits is 12000, while the sum is 33.

The square root of 65125815 is about 8070.0566912507. The cubic root of 65125815 is about 402.3318279479.

The spelling of 65125815 in words is "sixty-five million, one hundred twenty-five thousand, eight hundred fifteen".