65513145 has 32 divisors (see below), whose sum is σ = 107339904. Its totient is φ = 34112000.

The previous prime is 65513113. The next prime is 65513213. The reversal of 65513145 is 54131556.

65513145 = 466² + 467² + ... + 667².

It is not a de Polignac number, because 65513145 - 2⁵ = 65513113 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125485 + ... + 126005.

It is an arithmetic number, because the mean of its divisors is an integer number (3354372).

Almost surely, 2^65513145 is an apocalyptic number.

It is an amenable number.

65513145 is a deficient number, since it is larger than the sum of its proper divisors (41826759).

65513145 is a wasteful number, since it uses less digits than its factorization.

65513145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713.

The product of its digits is 9000, while the sum is 30.

The square root of 65513145 is about 8094.0190881910. The cubic root of 65513145 is about 403.1278628485.

The spelling of 65513145 in words is "sixty-five million, five hundred thirteen thousand, one hundred forty-five".