51347765 has 16 divisors (see below), whose sum is σ = 71048448. Its totient is φ = 34895616.

The previous prime is 51347731. The next prime is 51347773. The reversal of 51347765 is 56774315.

It is not a de Polignac number, because 51347765 - 2⁸ = 51347509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2537 + ... + 10446.

It is an arithmetic number, because the mean of its divisors is an integer number (4440528).

Almost surely, 2^51347765 is an apocalyptic number.

It is an amenable number.

51347765 is a deficient number, since it is larger than the sum of its proper divisors (19700683).

51347765 is a wasteful number, since it uses less digits than its factorization.

51347765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13108.

The product of its digits is 88200, while the sum is 38.

The square root of 51347765 is about 7165.7354821400. The cubic root of 51347765 is about 371.6839846163.

The spelling of 51347765 in words is "fifty-one million, three hundred forty-seven thousand, seven hundred sixty-five".