51326765 has 12 divisors (see below), whose sum is σ = 71648316. Its totient is φ = 35195328.

The previous prime is 51326741. The next prime is 51326801. The reversal of 51326765 is 56762315.

It can be written as a sum of positive squares in 2 ways, for example, as 11812969 + 39513796 = 3437^2 + 6286^2 .

It is not a de Polignac number, because 51326765 - 2⁶ = 51326701 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104504 + ... + 104993.

It is an arithmetic number, because the mean of its divisors is an integer number (5970693).

Almost surely, 2^51326765 is an apocalyptic number.

It is an amenable number.

51326765 is a deficient number, since it is larger than the sum of its proper divisors (20321551).

51326765 is a wasteful number, since it uses less digits than its factorization.

51326765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209516 (or 209509 counting only the distinct ones).

The product of its digits is 37800, while the sum is 35.

The square root of 51326765 is about 7164.2700256202. The cubic root of 51326765 is about 371.6333077725.

The spelling of 51326765 in words is "fifty-one million, three hundred twenty-six thousand, seven hundred sixty-five".