51739761 has 8 divisors (see below), whose sum is σ = 69022944. Its totient is φ = 34474880.

The previous prime is 51739733. The next prime is 51739763. The reversal of 51739761 is 16793715.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51739761 - 2¹³ = 51731569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51739763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4726 + ... + 11216.

It is an arithmetic number, because the mean of its divisors is an integer number (8627868).

Almost surely, 2^51739761 is an apocalyptic number.

It is an amenable number.

51739761 is a deficient number, since it is larger than the sum of its proper divisors (17283183).

51739761 is a wasteful number, since it uses less digits than its factorization.

51739761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9151.

The product of its digits is 39690, while the sum is 39.

The square root of 51739761 is about 7193.0355900690. The cubic root of 51739761 is about 372.6274170358.

The spelling of 51739761 in words is "fifty-one million, seven hundred thirty-nine thousand, seven hundred sixty-one".