51516265 has 16 divisors (see below), whose sum is σ = 65028096. Its totient is φ = 39124800.

The previous prime is 51516221. The next prime is 51516271. The reversal of 51516265 is 56261515.

It is not a de Polignac number, because 51516265 - 2¹³ = 51508073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5080 + ... + 11350.

It is an arithmetic number, because the mean of its divisors is an integer number (4064256).

Almost surely, 2^51516265 is an apocalyptic number.

It is an amenable number.

51516265 is a deficient number, since it is larger than the sum of its proper divisors (13511831).

51516265 is a wasteful number, since it uses less digits than its factorization.

51516265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6360.

The product of its digits is 9000, while the sum is 31.

The square root of 51516265 is about 7177.4831939894. The cubic root of 51516265 is about 372.0901066073.

The spelling of 51516265 in words is "fifty-one million, five hundred sixteen thousand, two hundred sixty-five".