51502065 has 24 divisors (see below), whose sum is σ = 86977728. Its totient is φ = 26019360.

The previous prime is 51502063. The next prime is 51502079. The reversal of 51502065 is 56020515.

It is not a de Polignac number, because 51502065 - 2¹ = 51502063 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51502063) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 660 + ... + 10170.

It is an arithmetic number, because the mean of its divisors is an integer number (3624072).

Almost surely, 2^51502065 is an apocalyptic number.

It is an amenable number.

51502065 is a deficient number, since it is larger than the sum of its proper divisors (35475663).

51502065 is a wasteful number, since it uses less digits than its factorization.

51502065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9557 (or 9538 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 51502065 is about 7176.4939211289. The cubic root of 51502065 is about 372.0559156901.

The spelling of 51502065 in words is "fifty-one million, five hundred two thousand, sixty-five".